139139090 has 16 divisors (see below), whose sum is σ = 263632320. Its totient is φ = 52726320.

The previous prime is 139139081. The next prime is 139139093. The reversal of 139139090 is 90931931.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 139139090.

It is not an unprimeable number, because it can be changed into a prime (139139093) 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, 365966 + ... + 366345.

It is an arithmetic number, because the mean of its divisors is an integer number (16477020).

Almost surely, 2^139139090 is an apocalyptic number.

139139090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139139090 is a deficient number, since it is larger than the sum of its proper divisors (124493230).

139139090 is a wasteful number, since it uses less digits than its factorization.

139139090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732337.

The product of its (nonzero) digits is 6561, while the sum is 35.

The square root of 139139090 is about 11795.7233775636. The cubic root of 139139090 is about 518.1828709885.

The spelling of 139139090 in words is "one hundred thirty-nine million, one hundred thirty-nine thousand, ninety".