999979980007 has 2 divisors, whose sum is σ = 999979980008. Its totient is φ = 999979980006.

The previous prime is 999979979993. The next prime is 999979980059. The reversal of 999979980007 is 700089979999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999979980007 - 2¹¹ = 999979977959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999979980407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499989990003 + 499989990004.

It is an arithmetic number, because the mean of its divisors is an integer number (499989990004).

Almost surely, 2^999979980007 is an apocalyptic number.

999979980007 is a deficient number, since it is larger than the sum of its proper divisors (1).

999979980007 is an equidigital number, since it uses as much as digits as its factorization.

999979980007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 208324872, while the sum is 76.

The spelling of 999979980007 in words is "nine hundred ninety-nine billion, nine hundred seventy-nine million, nine hundred eighty thousand, seven".