139649564 has 24 divisors (see below), whose sum is σ = 248371200. Its totient is φ = 68693040.

The previous prime is 139649561. The next prime is 139649593. The reversal of 139649564 is 465946931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139649561) 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, 112829 + ... + 114059.

It is an arithmetic number, because the mean of its divisors is an integer number (10348800).

Almost surely, 2^139649564 is an apocalyptic number.

It is an amenable number.

139649564 is a deficient number, since it is larger than the sum of its proper divisors (108721636).

139649564 is a wasteful number, since it uses less digits than its factorization.

139649564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673 (or 1671 counting only the distinct ones).

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

The square root of 139649564 is about 11817.3416638430. The cubic root of 139649564 is about 518.8158013206.

The spelling of 139649564 in words is "one hundred thirty-nine million, six hundred forty-nine thousand, five hundred sixty-four".