139981177 has 12 divisors (see below), whose sum is σ = 161291200. Its totient is φ = 119004336.

The previous prime is 139981169. The next prime is 139981187. The reversal of 139981177 is 771189931.

It is not a de Polignac number, because 139981177 - 2³ = 139981169 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139981187) 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, 441423 + ... + 441739.

Almost surely, 2^139981177 is an apocalyptic number.

It is an amenable number.

139981177 is a deficient number, since it is larger than the sum of its proper divisors (21310023).

139981177 is an frugal number, since it uses more digits than its factorization.

139981177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840 (or 523 counting only the distinct ones).

The product of its digits is 95256, while the sum is 46.

The square root of 139981177 is about 11831.3641225346. The cubic root of 139981177 is about 519.2261381144.

The spelling of 139981177 in words is "one hundred thirty-nine million, nine hundred eighty-one thousand, one hundred seventy-seven".