679623899 has 2 divisors, whose sum is σ = 679623900. Its totient is φ = 679623898.

The previous prime is 679623887. The next prime is 679623949. The reversal of 679623899 is 998326976.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679623899 is a prime.

It is not a weakly prime, because it can be changed into another prime (679623839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339811949 + 339811950.

It is an arithmetic number, because the mean of its divisors is an integer number (339811950).

Almost surely, 2^679623899 is an apocalyptic number.

679623899 is a deficient number, since it is larger than the sum of its proper divisors (1).

679623899 is an equidigital number, since it uses as much as digits as its factorization.

679623899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8817984, while the sum is 59.

The square root of 679623899 is about 26069.5972159142. The cubic root of 679623899 is about 879.2037817843.

The spelling of 679623899 in words is "six hundred seventy-nine million, six hundred twenty-three thousand, eight hundred ninety-nine".