139964564 has 12 divisors (see below), whose sum is σ = 257829600. Its totient is φ = 66298968.

The previous prime is 139964563. The next prime is 139964569. The reversal of 139964564 is 465469931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139964563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920744 + ... + 920895.

It is an arithmetic number, because the mean of its divisors is an integer number (21485800).

Almost surely, 2^139964564 is an apocalyptic number.

It is an amenable number.

139964564 is a deficient number, since it is larger than the sum of its proper divisors (117865036).

139964564 is a wasteful number, since it uses less digits than its factorization.

139964564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841662 (or 1841660 counting only the distinct ones).

The product of its digits is 699840, while the sum is 47.

The square root of 139964564 is about 11830.6620271226. The cubic root of 139964564 is about 519.2055966738.

The spelling of 139964564 in words is "one hundred thirty-nine million, nine hundred sixty-four thousand, five hundred sixty-four".