172931090 has 16 divisors (see below), whose sum is σ = 311427288. Its totient is φ = 69138816.

The previous prime is 172931069. The next prime is 172931093. The reversal of 172931090 is 90139271.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 143304841 + 29626249 = 11971^2 + 5443^2 .

It is not an unprimeable number, because it can be changed into a prime (172931093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33524 + ... + 38336.

Almost surely, 2^172931090 is an apocalyptic number.

172931090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172931090 is a deficient number, since it is larger than the sum of its proper divisors (138496198).

172931090 is a wasteful number, since it uses less digits than its factorization.

172931090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8413.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 172931090 is about 13150.3266119135. The cubic root of 172931090 is about 557.1314730149.

The spelling of 172931090 in words is "one hundred seventy-two million, nine hundred thirty-one thousand, ninety".