139479579 has 12 divisors (see below), whose sum is σ = 201573736. Its totient is φ = 92938752.

The previous prime is 139479559. The next prime is 139479583. The reversal of 139479579 is 975974931.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-139479579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139479559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28872 + ... + 33354.

Almost surely, 2^139479579 is an apocalyptic number.

139479579 is a deficient number, since it is larger than the sum of its proper divisors (62094157).

139479579 is a wasteful number, since it uses less digits than its factorization.

139479579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7946 (or 7943 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 139479579 is about 11810.1472895134. The cubic root of 139479579 is about 518.6052105905.

The spelling of 139479579 in words is "one hundred thirty-nine million, four hundred seventy-nine thousand, five hundred seventy-nine".