979688999 has 2 divisors, whose sum is σ = 979689000. Its totient is φ = 979688998.

The previous prime is 979688989. The next prime is 979689013. The reversal of 979688999 is 999886979.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 979688999 - 2¹² = 979684903 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (979688959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489844499 + 489844500.

It is an arithmetic number, because the mean of its divisors is an integer number (489844500).

Almost surely, 2^979688999 is an apocalyptic number.

979688999 is a deficient number, since it is larger than the sum of its proper divisors (1).

979688999 is an equidigital number, since it uses as much as digits as its factorization.

979688999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158723712, while the sum is 74.

The square root of 979688999 is about 31299.9840095806. The cubic root of 979688999 is about 993.1833045815.

The spelling of 979688999 in words is "nine hundred seventy-nine million, six hundred eighty-eight thousand, nine hundred ninety-nine".