139172090 has 16 divisors (see below), whose sum is σ = 251562240. Its totient is φ = 55434960.

The previous prime is 139172087. The next prime is 139172101. The reversal of 139172090 is 90271931.

It is a happy number.

139172090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26726 + ... + 31505.

It is an arithmetic number, because the mean of its divisors is an integer number (15722640).

Almost surely, 2^139172090 is an apocalyptic number.

139172090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139172090 is a deficient number, since it is larger than the sum of its proper divisors (112390150).

139172090 is a wasteful number, since it uses less digits than its factorization.

139172090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58477.

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

The square root of 139172090 is about 11797.1221066835. The cubic root of 139172090 is about 518.2238340350.

The spelling of 139172090 in words is "one hundred thirty-nine million, one hundred seventy-two thousand, ninety".