656039 has 2 divisors, whose sum is σ = 656040. Its totient is φ = 656038.

The previous prime is 656023. The next prime is 656063. The reversal of 656039 is 930656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656039 - 2⁴ = 656023 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328019 + 328020.

It is an arithmetic number, because the mean of its divisors is an integer number (328020).

2⁶⁵⁶⁰³⁹ is an apocalyptic number.

656039 is a deficient number, since it is larger than the sum of its proper divisors (1).

656039 is an equidigital number, since it uses as much as digits as its factorization.

656039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 656039 is about 809.9623448038. The cubic root of 656039 is about 86.8913515794.

The spelling of 656039 in words is "six hundred fifty-six thousand, thirty-nine".