115597381 has 2 divisors, whose sum is σ = 115597382. Its totient is φ = 115597380.

The previous prime is 115597367. The next prime is 115597397. The reversal of 115597381 is 183795511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109516225 + 6081156 = 10465^2 + 2466^2 .

It is an emirp because it is prime and its reverse (183795511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115597381 is a prime.

It is a super-2 number, since 2×115597381² = 26725508988118322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115597351) 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, 57798690 + 57798691.

It is an arithmetic number, because the mean of its divisors is an integer number (57798691).

Almost surely, 2^115597381 is an apocalyptic number.

It is an amenable number.

115597381 is a deficient number, since it is larger than the sum of its proper divisors (1).

115597381 is an equidigital number, since it uses as much as digits as its factorization.

115597381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 40.

The square root of 115597381 is about 10751.6222496886. The cubic root of 115597381 is about 487.1349970864.

The spelling of 115597381 in words is "one hundred fifteen million, five hundred ninety-seven thousand, three hundred eighty-one".