113500081 has 2 divisors, whose sum is σ = 113500082. Its totient is φ = 113500080.

The previous prime is 113500073. The next prime is 113500133. The reversal of 113500081 is 180005311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72335025 + 41165056 = 8505^2 + 6416^2 .

It is a cyclic number.

It is not a de Polignac number, because 113500081 - 2³ = 113500073 is a prime.

It is a super-2 number, since 2×113500081² = 25764536774013122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (113507081) 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 as a sum of consecutive naturals, namely, 56750040 + 56750041.

It is an arithmetic number, because the mean of its divisors is an integer number (56750041).

Almost surely, 2^113500081 is an apocalyptic number.

It is an amenable number.

113500081 is a deficient number, since it is larger than the sum of its proper divisors (1).

113500081 is an equidigital number, since it uses as much as digits as its factorization.

113500081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 113500081 is about 10653.6416778489. The cubic root of 113500081 is about 484.1709448416.

Adding to 113500081 its reverse (180005311), we get a palindrome (293505392).

The spelling of 113500081 in words is "one hundred thirteen million, five hundred thousand, eighty-one".