139381564 has 24 divisors (see below), whose sum is σ = 290884608. Its totient is φ = 57137520.

The previous prime is 139381547. The next prime is 139381577. The reversal of 139381564 is 465183931.

139381564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 107572 + ... + 108859.

It is an arithmetic number, because the mean of its divisors is an integer number (12120192).

Almost surely, 2^139381564 is an apocalyptic number.

139381564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

139381564 is an abundant number, since it is smaller than the sum of its proper divisors (151503044).

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

139381564 is a wasteful number, since it uses less digits than its factorization.

139381564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216465 (or 216463 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 139381564 is about 11805.9969507026. The cubic root of 139381564 is about 518.4837041511.

The spelling of 139381564 in words is "one hundred thirty-nine million, three hundred eighty-one thousand, five hundred sixty-four".