115930721 has 2 divisors, whose sum is σ = 115930722. Its totient is φ = 115930720.

The previous prime is 115930699. The next prime is 115930733. The reversal of 115930721 is 127039511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87628321 + 28302400 = 9361^2 + 5320^2 .

It is a cyclic number.

It is not a de Polignac number, because 115930721 - 2¹⁸ = 115668577 is a prime.

It is not a weakly prime, because it can be changed into another prime (115932721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57965360 + 57965361.

It is an arithmetic number, because the mean of its divisors is an integer number (57965361).

Almost surely, 2^115930721 is an apocalyptic number.

It is an amenable number.

115930721 is a deficient number, since it is larger than the sum of its proper divisors (1).

115930721 is an equidigital number, since it uses as much as digits as its factorization.

115930721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 115930721 is about 10767.1129370876. The cubic root of 115930721 is about 487.6027866543.

The spelling of 115930721 in words is "one hundred fifteen million, nine hundred thirty thousand, seven hundred twenty-one".