139042718 has 4 divisors (see below), whose sum is σ = 208564080. Its totient is φ = 69521358.

The previous prime is 139042669. The next prime is 139042723. The reversal of 139042718 is 817240931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 817240931 = 13 ⋅62864687.

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, 34760678 + ... + 34760681.

It is an arithmetic number, because the mean of its divisors is an integer number (52141020).

Almost surely, 2^139042718 is an apocalyptic number.

139042718 is a deficient number, since it is larger than the sum of its proper divisors (69521362).

139042718 is an equidigital number, since it uses as much as digits as its factorization.

139042718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69521361.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 139042718 is about 11791.6376301174. The cubic root of 139042718 is about 518.0632069082.

The spelling of 139042718 in words is "one hundred thirty-nine million, forty-two thousand, seven hundred eighteen".