115763981 has 2 divisors, whose sum is σ = 115763982. Its totient is φ = 115763980.

The previous prime is 115763957. The next prime is 115763987. The reversal of 115763981 is 189367511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91508356 + 24255625 = 9566^2 + 4925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115763981 is a prime.

It is a super-2 number, since 2×115763981² = 26802598593936722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115763987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57881990 + 57881991.

It is an arithmetic number, because the mean of its divisors is an integer number (57881991).

Almost surely, 2^115763981 is an apocalyptic number.

It is an amenable number.

115763981 is a deficient number, since it is larger than the sum of its proper divisors (1).

115763981 is an equidigital number, since it uses as much as digits as its factorization.

115763981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 41.

The square root of 115763981 is about 10759.3671282283. The cubic root of 115763981 is about 487.3689058857.

The spelling of 115763981 in words is "one hundred fifteen million, seven hundred sixty-three thousand, nine hundred eighty-one".