99789023 has 2 divisors, whose sum is σ = 99789024. Its totient is φ = 99789022.

The previous prime is 99789017. The next prime is 99789071. The reversal of 99789023 is 32098799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99789023 - 2⁶ = 99788959 is a prime.

It is a super-2 number, since 2×99789023² = 19915698222589058, which contains 22 as substring.

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 (99789223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49894511 + 49894512.

It is an arithmetic number, because the mean of its divisors is an integer number (49894512).

Almost surely, 2^99789023 is an apocalyptic number.

99789023 is a deficient number, since it is larger than the sum of its proper divisors (1).

99789023 is an equidigital number, since it uses as much as digits as its factorization.

99789023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 99789023 is about 9989.4455802111. The cubic root of 99789023 is about 463.8322307037.

The spelling of 99789023 in words is "ninety-nine million, seven hundred eighty-nine thousand, twenty-three".