108961657 has 4 divisors (see below), whose sum is σ = 124527616. Its totient is φ = 93395700.

The previous prime is 108961627. The next prime is 108961663. The reversal of 108961657 is 756169801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 756169801 = 983 ⋅769247.

It is a cyclic number.

It is not a de Polignac number, because 108961657 - 2⁷ = 108961529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108961607) 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 3 ways as a sum of consecutive naturals, for example, 7782969 + ... + 7782982.

It is an arithmetic number, because the mean of its divisors is an integer number (31131904).

Almost surely, 2^108961657 is an apocalyptic number.

It is an amenable number.

108961657 is a deficient number, since it is larger than the sum of its proper divisors (15565959).

108961657 is an equidigital number, since it uses as much as digits as its factorization.

108961657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15565958.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 108961657 is about 10438.4700507306. The cubic root of 108961657 is about 477.6295996089.

The spelling of 108961657 in words is "one hundred eight million, nine hundred sixty-one thousand, six hundred fifty-seven".