139817090 has 32 divisors (see below), whose sum is σ = 293500800. Its totient is φ = 47936112.

The previous prime is 139817081. The next prime is 139817101. The reversal of 139817090 is 90718931.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16952 + ... + 23811.

It is an arithmetic number, because the mean of its divisors is an integer number (9171900).

Almost surely, 2^139817090 is an apocalyptic number.

139817090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139817090 is an abundant number, since it is smaller than the sum of its proper divisors (153683710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139817090 is an equidigital number, since it uses as much as digits as its factorization.

139817090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40791 (or 40777 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 139817090 is about 11824.4276817104. The cubic root of 139817090 is about 519.0231785145.

The spelling of 139817090 in words is "one hundred thirty-nine million, eight hundred seventeen thousand, ninety".