139131464 has 16 divisors (see below), whose sum is σ = 261500400. Its totient is φ = 69398032.

The previous prime is 139131437. The next prime is 139131511. The reversal of 139131464 is 464131931.

139131464 is nontrivially palindromic in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 139131464.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17402 + ... + 24105.

It is an arithmetic number, because the mean of its divisors is an integer number (16343775).

Almost surely, 2^139131464 is an apocalyptic number.

It is an amenable number.

139131464 is a deficient number, since it is larger than the sum of its proper divisors (122368936).

139131464 is a wasteful number, since it uses less digits than its factorization.

139131464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41932 (or 41928 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 139131464 is about 11795.4001203859. The cubic root of 139131464 is about 518.1734038795.

The spelling of 139131464 in words is "one hundred thirty-nine million, one hundred thirty-one thousand, four hundred sixty-four".