500679989 has 2 divisors, whose sum is σ = 500679990. Its totient is φ = 500679988.

The previous prime is 500679979. The next prime is 500679997. The reversal of 500679989 is 989976005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280395025 + 220284964 = 16745^2 + 14842^2 .

It is a cyclic number.

It is not a de Polignac number, because 500679989 - 2⁴ = 500679973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 500679989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (500679979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250339994 + 250339995.

It is an arithmetic number, because the mean of its divisors is an integer number (250339995).

Almost surely, 2^500679989 is an apocalyptic number.

It is an amenable number.

500679989 is a deficient number, since it is larger than the sum of its proper divisors (1).

500679989 is an equidigital number, since it uses as much as digits as its factorization.

500679989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 500679989 is about 22375.8796251678. The cubic root of 500679989 is about 794.0601680829.

The spelling of 500679989 in words is "five hundred million, six hundred seventy-nine thousand, nine hundred eighty-nine".