109615961 has 16 divisors (see below), whose sum is σ = 135738624. Its totient is φ = 86197824.

The previous prime is 109615951. The next prime is 109615981. The reversal of 109615961 is 169516901.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109615961 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (109615931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11591 + ... + 18803.

It is an arithmetic number, because the mean of its divisors is an integer number (8483664).

Almost surely, 2^109615961 is an apocalyptic number.

It is an amenable number.

109615961 is a deficient number, since it is larger than the sum of its proper divisors (26122663).

109615961 is a wasteful number, since it uses less digits than its factorization.

109615961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7400.

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 109615961 is about 10469.7641329688. The cubic root of 109615961 is about 478.5837318671.

The spelling of 109615961 in words is "one hundred nine million, six hundred fifteen thousand, nine hundred sixty-one".