690347139 has 16 divisors (see below), whose sum is σ = 980923392. Its totient is φ = 430852928.

The previous prime is 690347123. The next prime is 690347167. The reversal of 690347139 is 931743096.

It is not a de Polignac number, because 690347139 - 2⁴ = 690347123 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 690347139.

It is not an unprimeable number, because it can be changed into a prime (690347239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103194 + ... + 109679.

It is an arithmetic number, because the mean of its divisors is an integer number (61307712).

Almost surely, 2^690347139 is an apocalyptic number.

690347139 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

690347139 is a deficient number, since it is larger than the sum of its proper divisors (290576253).

690347139 is a wasteful number, since it uses less digits than its factorization.

690347139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212946.

The product of its (nonzero) digits is 122472, while the sum is 42.

The square root of 690347139 is about 26274.4579201931. The cubic root of 690347139 is about 883.8037564388.

The spelling of 690347139 in words is "six hundred ninety million, three hundred forty-seven thousand, one hundred thirty-nine".