139507664 has 40 divisors (see below), whose sum is σ = 275473440. Its totient is φ = 68432000.

The previous prime is 139507663. The next prime is 139507691. The reversal of 139507664 is 466705931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139507663) 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, 211367 + ... + 212025.

It is an arithmetic number, because the mean of its divisors is an integer number (6886836).

Almost surely, 2^139507664 is an apocalyptic number.

It is an amenable number.

139507664 is a deficient number, since it is larger than the sum of its proper divisors (135965776).

139507664 is a wasteful number, since it uses less digits than its factorization.

139507664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899 (or 893 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 139507664 is about 11811.3362495528. The cubic root of 139507664 is about 518.6400162826.

The spelling of 139507664 in words is "one hundred thirty-nine million, five hundred seven thousand, six hundred sixty-four".