115961979 has 24 divisors (see below), whose sum is σ = 185668608. Its totient is φ = 64123920.

The previous prime is 115961977. The next prime is 115961983. The reversal of 115961979 is 979169511.

It is a happy number.

It is not a de Polignac number, because 115961979 - 2¹ = 115961977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115961971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8167 + ... + 17280.

It is an arithmetic number, because the mean of its divisors is an integer number (7736192).

Almost surely, 2^115961979 is an apocalyptic number.

115961979 is a deficient number, since it is larger than the sum of its proper divisors (69706629).

115961979 is a wasteful number, since it uses less digits than its factorization.

115961979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25495 (or 25488 counting only the distinct ones).

The product of its digits is 153090, while the sum is 48.

The square root of 115961979 is about 10768.5643889982. The cubic root of 115961979 is about 487.6466062682.

The spelling of 115961979 in words is "one hundred fifteen million, nine hundred sixty-one thousand, nine hundred seventy-nine".