139877 has 4 divisors (see below), whose sum is σ = 141036. Its totient is φ = 138720.

The previous prime is 139871. The next prime is 139883. The reversal of 139877 is 778931.

It is a Cunningham number, because it is equal to 374²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 778931 = 47 ⋅16573.

It is an interprime number because it is at equal distance from previous prime (139871) and next prime (139883).

It can be written as a sum of positive squares in 2 ways, for example, as 81796 + 58081 = 286^2 + 241^2 .

It is a cyclic number.

It is not a de Polignac number, because 139877 - 2⁴ = 139861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139877.

It is not an unprimeable number, because it can be changed into a prime (139871) 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 3 ways as a sum of consecutive naturals, for example, 374 + ... + 647.

It is an arithmetic number, because the mean of its divisors is an integer number (35259).

2¹³⁹⁸⁷⁷ is an apocalyptic number.

It is an amenable number.

139877 is a deficient number, since it is larger than the sum of its proper divisors (1159).

139877 is a wasteful number, since it uses less digits than its factorization.

139877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158.

The product of its digits is 10584, while the sum is 35.

The square root of 139877 is about 374.0013368960. The cubic root of 139877 is about 51.9097299731.

The spelling of 139877 in words is "one hundred thirty-nine thousand, eight hundred seventy-seven".