113782861 has 4 divisors (see below), whose sum is σ = 113812924. Its totient is φ = 113752800.

The previous prime is 113782847. The next prime is 113782871. The reversal of 113782861 is 168287311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168287311 = 101 ⋅1666211.

It can be written as a sum of positive squares in 2 ways, for example, as 31427236 + 82355625 = 5606^2 + 9075^2 .

It is a cyclic number.

It is not a de Polignac number, because 113782861 - 2⁵ = 113782829 is a prime.

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 113782861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113782841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8370 + ... + 17251.

It is an arithmetic number, because the mean of its divisors is an integer number (28453231).

Almost surely, 2^113782861 is an apocalyptic number.

It is an amenable number.

113782861 is a deficient number, since it is larger than the sum of its proper divisors (30063).

113782861 is an equidigital number, since it uses as much as digits as its factorization.

113782861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30062.

The product of its digits is 16128, while the sum is 37.

The square root of 113782861 is about 10666.9049400470. The cubic root of 113782861 is about 484.5727075861.

The spelling of 113782861 in words is "one hundred thirteen million, seven hundred eighty-two thousand, eight hundred sixty-one".