108431857 has 4 divisors (see below), whose sum is σ = 108742900. Its totient is φ = 108120816.

The previous prime is 108431837. The next prime is 108431863. The reversal of 108431857 is 758134801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66324736 + 42107121 = 8144^2 + 6489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108431857 is a prime.

It is a super-2 number, since 2×108431857² = 23514935224936898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108431837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154998 + ... + 155695.

It is an arithmetic number, because the mean of its divisors is an integer number (27185725).

Almost surely, 2^108431857 is an apocalyptic number.

It is an amenable number.

108431857 is a deficient number, since it is larger than the sum of its proper divisors (311043).

108431857 is an equidigital number, since it uses as much as digits as its factorization.

108431857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311042.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 108431857 is about 10413.0618455861. The cubic root of 108431857 is about 476.8542216486.

The spelling of 108431857 in words is "one hundred eight million, four hundred thirty-one thousand, eight hundred fifty-seven".