108091557 has 32 divisors (see below), whose sum is σ = 183567360. Its totient is φ = 61579440.

The previous prime is 108091553. The next prime is 108091583. The reversal of 108091557 is 755190801.

108091557 is a `hidden beast` number, since 10 + 8 + 0 + 91 + 557 = 666.

It is not a de Polignac number, because 108091557 - 2² = 108091553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108091553) 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 31 ways as a sum of consecutive naturals, for example, 83082 + ... + 84372.

It is an arithmetic number, because the mean of its divisors is an integer number (5736480).

Almost surely, 2^108091557 is an apocalyptic number.

It is an amenable number.

108091557 is a deficient number, since it is larger than the sum of its proper divisors (75475803).

108091557 is a wasteful number, since it uses less digits than its factorization.

108091557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750 (or 1744 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 108091557 is about 10396.7089504323. The cubic root of 108091557 is about 476.3548495048.

The spelling of 108091557 in words is "one hundred eight million, ninety-one thousand, five hundred fifty-seven".