659431 has 4 divisors (see below), whose sum is σ = 682200. Its totient is φ = 636664.

The previous prime is 659423. The next prime is 659437. The reversal of 659431 is 134956.

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 659431 - 2³ = 659423 is a prime.

It is a super-2 number, since 2×659431² = 869698487522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 659431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659437) 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, 11341 + ... + 11398.

It is an arithmetic number, because the mean of its divisors is an integer number (170550).

2⁶⁵⁹⁴³¹ is an apocalyptic number.

659431 is a deficient number, since it is larger than the sum of its proper divisors (22769).

659431 is a wasteful number, since it uses less digits than its factorization.

659431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22768.

The product of its digits is 3240, while the sum is 28.

The square root of 659431 is about 812.0535696615. The cubic root of 659431 is about 87.0408492716.

The spelling of 659431 in words is "six hundred fifty-nine thousand, four hundred thirty-one".