662319979 has 2 divisors, whose sum is σ = 662319980. Its totient is φ = 662319978.

The previous prime is 662319971. The next prime is 662319989. The reversal of 662319979 is 979913266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 662319979 - 2³ = 662319971 is a prime.

It is not a weakly prime, because it can be changed into another prime (662319971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331159989 + 331159990.

It is an arithmetic number, because the mean of its divisors is an integer number (331159990).

Almost surely, 2^662319979 is an apocalyptic number.

662319979 is a deficient number, since it is larger than the sum of its proper divisors (1).

662319979 is an equidigital number, since it uses as much as digits as its factorization.

662319979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102248, while the sum is 52.

The square root of 662319979 is about 25735.5780778284. The cubic root of 662319979 is about 871.6777327182.

The spelling of 662319979 in words is "six hundred sixty-two million, three hundred nineteen thousand, nine hundred seventy-nine".