642460589 has 2 divisors, whose sum is σ = 642460590. Its totient is φ = 642460588.

The previous prime is 642460477. The next prime is 642460597. The reversal of 642460589 is 985064246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 605652100 + 36808489 = 24610^2 + 6067^2 .

It is a cyclic number.

It is not a de Polignac number, because 642460589 - 2²⁸ = 374025133 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642460289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321230294 + 321230295.

It is an arithmetic number, because the mean of its divisors is an integer number (321230295).

Almost surely, 2^642460589 is an apocalyptic number.

It is an amenable number.

642460589 is a deficient number, since it is larger than the sum of its proper divisors (1).

642460589 is an equidigital number, since it uses as much as digits as its factorization.

642460589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 642460589 is about 25346.8062879725. The cubic root of 642460589 is about 862.8768758070.

The spelling of 642460589 in words is "six hundred forty-two million, four hundred sixty thousand, five hundred eighty-nine".