679719923 has 2 divisors, whose sum is σ = 679719924. Its totient is φ = 679719922.

The previous prime is 679719907. The next prime is 679720021. The reversal of 679719923 is 329917976.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 679719923 - 2⁴ = 679719907 is a prime.

It is not a weakly prime, because it can be changed into another prime (679715923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339859961 + 339859962.

It is an arithmetic number, because the mean of its divisors is an integer number (339859962).

Almost surely, 2^679719923 is an apocalyptic number.

679719923 is a deficient number, since it is larger than the sum of its proper divisors (1).

679719923 is an equidigital number, since it uses as much as digits as its factorization.

679719923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1285956, while the sum is 53.

The square root of 679719923 is about 26071.4388363972. The cubic root of 679719923 is about 879.2451873756.

The spelling of 679719923 in words is "six hundred seventy-nine million, seven hundred nineteen thousand, nine hundred twenty-three".