139900779 has 6 divisors (see below), whose sum is σ = 202078916. Its totient is φ = 93267180.

The previous prime is 139900771. The next prime is 139900793. The reversal of 139900779 is 977009931.

It is not a de Polignac number, because 139900779 - 2³ = 139900771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139900771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7772257 + ... + 7772274.

Almost surely, 2^139900779 is an apocalyptic number.

139900779 is a deficient number, since it is larger than the sum of its proper divisors (62178137).

139900779 is a wasteful number, since it uses less digits than its factorization.

139900779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15544537 (or 15544534 counting only the distinct ones).

The product of its (nonzero) digits is 107163, while the sum is 45.

The square root of 139900779 is about 11827.9659705293. The cubic root of 139900779 is about 519.1267134667.

The spelling of 139900779 in words is "one hundred thirty-nine million, nine hundred thousand, seven hundred seventy-nine".