679840927 has 2 divisors, whose sum is σ = 679840928. Its totient is φ = 679840926.

The previous prime is 679840873. The next prime is 679840933. The reversal of 679840927 is 729048976.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 679840927 - 2²³ = 671452319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679840327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339920463 + 339920464.

It is an arithmetic number, because the mean of its divisors is an integer number (339920464).

Almost surely, 2^679840927 is an apocalyptic number.

679840927 is a deficient number, since it is larger than the sum of its proper divisors (1).

679840927 is an equidigital number, since it uses as much as digits as its factorization.

679840927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 679840927 is about 26073.7593568707. The cubic root of 679840927 is about 879.2973588011.

The spelling of 679840927 in words is "six hundred seventy-nine million, eight hundred forty thousand, nine hundred twenty-seven".