143497609 has 4 divisors (see below), whose sum is σ = 143555220. Its totient is φ = 143440000.

The previous prime is 143497591. The next prime is 143497649. The reversal of 143497609 is 906794341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906794341 = 61 ⋅14865481.

It can be written as a sum of positive squares in 2 ways, for example, as 26749584 + 116748025 = 5172^2 + 10805^2 .

It is a cyclic number.

It is not a de Polignac number, because 143497609 - 2⁹ = 143497097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143497649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24892 + ... + 30109.

It is an arithmetic number, because the mean of its divisors is an integer number (35888805).

Almost surely, 2^143497609 is an apocalyptic number.

It is an amenable number.

143497609 is a deficient number, since it is larger than the sum of its proper divisors (57611).

143497609 is an equidigital number, since it uses as much as digits as its factorization.

143497609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57610.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 143497609 is about 11979.0487518834. The cubic root of 143497609 is about 523.5380144728.

The spelling of 143497609 in words is "one hundred forty-three million, four hundred ninety-seven thousand, six hundred nine".