139277438 has 4 divisors (see below), whose sum is σ = 208916160. Its totient is φ = 69638718.

The previous prime is 139277423. The next prime is 139277441. The reversal of 139277438 is 834772931.

139277438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34819358 + ... + 34819361.

It is an arithmetic number, because the mean of its divisors is an integer number (52229040).

Almost surely, 2^139277438 is an apocalyptic number.

139277438 is a deficient number, since it is larger than the sum of its proper divisors (69638722).

139277438 is an equidigital number, since it uses as much as digits as its factorization.

139277438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69638721.

The product of its digits is 254016, while the sum is 44.

The square root of 139277438 is about 11801.5862493141. The cubic root of 139277438 is about 518.3545596594.

The spelling of 139277438 in words is "one hundred thirty-nine million, two hundred seventy-seven thousand, four hundred thirty-eight".