139371620 has 24 divisors (see below), whose sum is σ = 294651000. Its totient is φ = 55373312.

The previous prime is 139371613. The next prime is 139371623. The reversal of 139371620 is 26173931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 320356 + 139051264 = 566^2 + 11792^2 .

It is a super-2 number, since 2×139371620² = 38848896922848800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139371623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20405 + ... + 26364.

It is an arithmetic number, because the mean of its divisors is an integer number (12277125).

Almost surely, 2^139371620 is an apocalyptic number.

139371620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139371620 is an abundant number, since it is smaller than the sum of its proper divisors (155279380).

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

139371620 is a wasteful number, since it uses less digits than its factorization.

139371620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46927 (or 46925 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 139371620 is about 11805.5758012898. The cubic root of 139371620 is about 518.4713736715.

The spelling of 139371620 in words is "one hundred thirty-nine million, three hundred seventy-one thousand, six hundred twenty".