115909477 has 2 divisors, whose sum is σ = 115909478. Its totient is φ = 115909476.

The previous prime is 115909457. The next prime is 115909487. The reversal of 115909477 is 774909511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105144516 + 10764961 = 10254^2 + 3281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115909477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115909427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57954738 + 57954739.

It is an arithmetic number, because the mean of its divisors is an integer number (57954739).

Almost surely, 2^115909477 is an apocalyptic number.

It is an amenable number.

115909477 is a deficient number, since it is larger than the sum of its proper divisors (1).

115909477 is an equidigital number, since it uses as much as digits as its factorization.

115909477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 43.

The square root of 115909477 is about 10766.1263693122. The cubic root of 115909477 is about 487.5730008584.

The spelling of 115909477 in words is "one hundred fifteen million, nine hundred nine thousand, four hundred seventy-seven".