659494139 has 4 divisors (see below), whose sum is σ = 674831256. Its totient is φ = 644157024.

The previous prime is 659494117. The next prime is 659494163. The reversal of 659494139 is 931494956.

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

It is a cyclic number.

It is not a de Polignac number, because 659494139 - 2¹⁶ = 659428603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (659494169) 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, 7668494 + ... + 7668579.

It is an arithmetic number, because the mean of its divisors is an integer number (168707814).

Almost surely, 2^659494139 is an apocalyptic number.

659494139 is a deficient number, since it is larger than the sum of its proper divisors (15337117).

659494139 is a wasteful number, since it uses less digits than its factorization.

659494139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15337116.

The product of its digits is 1049760, while the sum is 50.

The square root of 659494139 is about 25680.6179637485. The cubic root of 659494139 is about 870.4362716994.

The spelling of 659494139 in words is "six hundred fifty-nine million, four hundred ninety-four thousand, one hundred thirty-nine".