141819661 has 4 divisors (see below), whose sum is σ = 150162012. Its totient is φ = 133477312.

The previous prime is 141819649. The next prime is 141819673. The reversal of 141819661 is 166918141.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166918141 = 13 ⋅12839857.

It is an interprime number because it is at equal distance from previous prime (141819649) and next prime (141819673).

It can be written as a sum of positive squares in 2 ways, for example, as 116769636 + 25050025 = 10806^2 + 5005^2 .

It is a cyclic number.

It is not a de Polignac number, because 141819661 - 2¹³ = 141811469 is a prime.

It is a super-2 number, since 2×141819661² = 40225632492309842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 141819661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (141819611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4171150 + ... + 4171183.

It is an arithmetic number, because the mean of its divisors is an integer number (37540503).

Almost surely, 2^141819661 is an apocalyptic number.

It is an amenable number.

141819661 is a deficient number, since it is larger than the sum of its proper divisors (8342351).

141819661 is an equidigital number, since it uses as much as digits as its factorization.

141819661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8342350.

The product of its digits is 10368, while the sum is 37.

The square root of 141819661 is about 11908.8060274740. The cubic root of 141819661 is about 521.4893949118.

The spelling of 141819661 in words is "one hundred forty-one million, eight hundred nineteen thousand, six hundred sixty-one".