108172690 has 16 divisors (see below), whose sum is σ = 196499160. Its totient is φ = 42871680.

The previous prime is 108172663. The next prime is 108172699. The reversal of 108172690 is 96271801.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 108139201 + 33489 = 10399^2 + 183^2 .

It is a super-2 number, since 2×108172690² = 23402661723672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (108172699) 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 7 ways as a sum of consecutive naturals, for example, 48531 + ... + 50710.

Almost surely, 2^108172690 is an apocalyptic number.

108172690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

108172690 is a deficient number, since it is larger than the sum of its proper divisors (88326470).

108172690 is a wasteful number, since it uses less digits than its factorization.

108172690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99357.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 108172690 is about 10400.6100782598. The cubic root of 108172690 is about 476.4740029133.

The spelling of 108172690 in words is "one hundred eight million, one hundred seventy-two thousand, six hundred ninety".