139977 has 12 divisors (see below), whose sum is σ = 205504. Its totient is φ = 91800.

The previous prime is 139969. The next prime is 139981. The reversal of 139977 is 779931.

It is not a de Polignac number, because 139977 - 2³ = 139969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 852 + ... + 1002.

139977 is a Friedman number, since it can be written as 9+3^7*(9*7+1), using all its digits and the basic arithmetic operations.

2¹³⁹⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

139977 is a deficient number, since it is larger than the sum of its proper divisors (65527).

139977 is a wasteful number, since it uses less digits than its factorization.

139977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 257 counting only the distinct ones).

The product of its digits is 11907, while the sum is 36.

The square root of 139977 is about 374.1350023721. The cubic root of 139977 is about 51.9220973541.

It can be divided in two parts, 13997 and 7, that multiplied together give a palindrome (97979).

The spelling of 139977 in words is "one hundred thirty-nine thousand, nine hundred seventy-seven".