108915961 has 32 divisors (see below), whose sum is σ = 144460800. Its totient is φ = 79548480.

The previous prime is 108915953. The next prime is 108915973. The reversal of 108915961 is 169519801.

It is not a de Polignac number, because 108915961 - 2³ = 108915953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (108915941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159126 + ... + 159808.

It is an arithmetic number, because the mean of its divisors is an integer number (4514400).

Almost surely, 2^108915961 is an apocalyptic number.

108915961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

108915961 is a deficient number, since it is larger than the sum of its proper divisors (35544839).

108915961 is a wasteful number, since it uses less digits than its factorization.

108915961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829.

The product of its (nonzero) digits is 19440, while the sum is 40.

The square root of 108915961 is about 10436.2809946839. The cubic root of 108915961 is about 477.5628213355.

The spelling of 108915961 in words is "one hundred eight million, nine hundred fifteen thousand, nine hundred sixty-one".