999928020031 has 2 divisors, whose sum is σ = 999928020032. Its totient is φ = 999928020030.

The previous prime is 999928020017. The next prime is 999928020053. The reversal of 999928020031 is 130020829999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999928020031 is a prime.

It is a super-2 number, since 2×999928020031² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999928020001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499964010015 + 499964010016.

It is an arithmetic number, because the mean of its divisors is an integer number (499964010016).

Almost surely, 2^999928020031 is an apocalyptic number.

999928020031 is the 447198-th centered decagonal number.

999928020031 is a deficient number, since it is larger than the sum of its proper divisors (1).

999928020031 is an equidigital number, since it uses as much as digits as its factorization.

999928020031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 52.

The spelling of 999928020031 in words is "nine hundred ninety-nine billion, nine hundred twenty-eight million, twenty thousand, thirty-one".