113645381 has 2 divisors, whose sum is σ = 113645382. Its totient is φ = 113645380.

The previous prime is 113645353. The next prime is 113645383. The reversal of 113645381 is 183546311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91508356 + 22137025 = 9566^2 + 4705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113645381 is a prime.

It is a super-2 number, since 2×113645381² = 25830545245270322, which contains 22 as substring.

Together with 113645383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113645383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56822690 + 56822691.

It is an arithmetic number, because the mean of its divisors is an integer number (56822691).

Almost surely, 2^113645381 is an apocalyptic number.

It is an amenable number.

113645381 is a deficient number, since it is larger than the sum of its proper divisors (1).

113645381 is an equidigital number, since it uses as much as digits as its factorization.

113645381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 113645381 is about 10660.4587612354. The cubic root of 113645381 is about 484.3774646340.

The spelling of 113645381 in words is "one hundred thirteen million, six hundred forty-five thousand, three hundred eighty-one".