9990031023 has 16 divisors (see below), whose sum is σ = 16914338560. Its totient is φ = 5708589048.

The previous prime is 9990031021. The next prime is 9990031057. The reversal of 9990031023 is 3201300999.

It is not a de Polignac number, because 9990031023 - 2¹ = 9990031021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9990031021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26428465 + ... + 26428842.

It is an arithmetic number, because the mean of its divisors is an integer number (1057146160).

Almost surely, 2^9990031023 is an apocalyptic number.

9990031023 is a deficient number, since it is larger than the sum of its proper divisors (6924307537).

9990031023 is a wasteful number, since it uses less digits than its factorization.

9990031023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52857323 (or 52857317 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 9990031023 is about 99950.1426862413. The cubic root of 9990031023 is about 2153.7185350056.

The spelling of 9990031023 in words is "nine billion, nine hundred ninety million, thirty-one thousand, twenty-three".