139405877 has 16 divisors (see below), whose sum is σ = 152866560. Its totient is φ = 126360000.

The previous prime is 139405859. The next prime is 139405879. The reversal of 139405877 is 778504931.

It is not a de Polignac number, because 139405877 - 2²⁶ = 72297013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139405879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185252 + ... + 186002.

It is an arithmetic number, because the mean of its divisors is an integer number (9554160).

Almost surely, 2^139405877 is an apocalyptic number.

It is an amenable number.

139405877 is a deficient number, since it is larger than the sum of its proper divisors (13460683).

139405877 is a wasteful number, since it uses less digits than its factorization.

139405877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 139405877 is about 11807.0265943632. The cubic root of 139405877 is about 518.5138496047.

The spelling of 139405877 in words is "one hundred thirty-nine million, four hundred five thousand, eight hundred seventy-seven".