9999023031 has 12 divisors (see below), whose sum is σ = 14617046808. Its totient is φ = 6585701424.

The previous prime is 9999023029. The next prime is 9999023101. The reversal of 9999023031 is 1303209999.

It is not a de Polignac number, because 9999023031 - 2¹ = 9999023029 is a prime.

It is a super-2 number, since 2×9999023031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999023431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6692040 + ... + 6693533.

It is an arithmetic number, because the mean of its divisors is an integer number (1218087234).

Almost surely, 2^9999023031 is an apocalyptic number.

9999023031 is a deficient number, since it is larger than the sum of its proper divisors (4618023777).

9999023031 is a wasteful number, since it uses less digits than its factorization.

9999023031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13385662 (or 13385659 counting only the distinct ones).

The product of its (nonzero) digits is 118098, while the sum is 45.

The square root of 9999023031 is about 99995.1150356856. The cubic root of 9999023031 is about 2154.3645272168.

The spelling of 9999023031 in words is "nine billion, nine hundred ninety-nine million, twenty-three thousand, thirty-one".