115439971 has 2 divisors, whose sum is σ = 115439972. Its totient is φ = 115439970.

The previous prime is 115439957. The next prime is 115440113. The reversal of 115439971 is 179934511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115439971 - 2¹¹ = 115437923 is a prime.

It is not a weakly prime, because it can be changed into another prime (115439771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57719985 + 57719986.

It is an arithmetic number, because the mean of its divisors is an integer number (57719986).

Almost surely, 2^115439971 is an apocalyptic number.

115439971 is a deficient number, since it is larger than the sum of its proper divisors (1).

115439971 is an equidigital number, since it uses as much as digits as its factorization.

115439971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 40.

The square root of 115439971 is about 10744.2994652979. The cubic root of 115439971 is about 486.9137846021.

The spelling of 115439971 in words is "one hundred fifteen million, four hundred thirty-nine thousand, nine hundred seventy-one".