9915972023 has 2 divisors, whose sum is σ = 9915972024. Its totient is φ = 9915972022.

The previous prime is 9915972013. The next prime is 9915972107. The reversal of 9915972023 is 3202795199.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9915972023 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 (9915972013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4957986011 + 4957986012.

It is an arithmetic number, because the mean of its divisors is an integer number (4957986012).

Almost surely, 2^9915972023 is an apocalyptic number.

9915972023 is a deficient number, since it is larger than the sum of its proper divisors (1).

9915972023 is an equidigital number, since it uses as much as digits as its factorization.

9915972023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 9915972023 is about 99578.9737996933. The cubic root of 9915972023 is about 2148.3832823776.

The spelling of 9915972023 in words is "nine billion, nine hundred fifteen million, nine hundred seventy-two thousand, twenty-three".