139257707 has 4 divisors (see below), whose sum is σ = 146587080. Its totient is φ = 131928336.

The previous prime is 139257661. The next prime is 139257719. The reversal of 139257707 is 707752931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 707752931 = 47 ⋅15058573.

It is a cyclic number.

It is not a de Polignac number, because 139257707 - 2¹⁰ = 139256683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139257007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3664658 + ... + 3664695.

It is an arithmetic number, because the mean of its divisors is an integer number (36646770).

Almost surely, 2^139257707 is an apocalyptic number.

139257707 is a deficient number, since it is larger than the sum of its proper divisors (7329373).

139257707 is an equidigital number, since it uses as much as digits as its factorization.

139257707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7329372.

The product of its (nonzero) digits is 92610, while the sum is 41.

The square root of 139257707 is about 11800.7502727581. The cubic root of 139257707 is about 518.3300806124.

The spelling of 139257707 in words is "one hundred thirty-nine million, two hundred fifty-seven thousand, seven hundred seven".