139487976 has 24 divisors (see below), whose sum is σ = 377780130. Its totient is φ = 46495968.

The previous prime is 139487947. The next prime is 139488047. The reversal of 139487976 is 679784931.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 95531076 + 43956900 = 9774^2 + 6630^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 968595 + ... + 968738.

Almost surely, 2^139487976 is an apocalyptic number.

It is an amenable number.

139487976 is an abundant number, since it is smaller than the sum of its proper divisors (238292154).

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

139487976 is a wasteful number, since it uses less digits than its factorization.

139487976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937345 (or 1937338 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 139487976 is about 11810.5027835397. The cubic root of 139487976 is about 518.6156174677.

The spelling of 139487976 in words is "one hundred thirty-nine million, four hundred eighty-seven thousand, nine hundred seventy-six".