90042023 has 2 divisors, whose sum is σ = 90042024. Its totient is φ = 90042022.

The previous prime is 90041999. The next prime is 90042077. The reversal of 90042023 is 32024009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90042023 - 2⁸ = 90041767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90041986 and 90042004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90342023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45021011 + 45021012.

It is an arithmetic number, because the mean of its divisors is an integer number (45021012).

Almost surely, 2^90042023 is an apocalyptic number.

90042023 is a deficient number, since it is larger than the sum of its proper divisors (1).

90042023 is an equidigital number, since it uses as much as digits as its factorization.

90042023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 90042023 is about 9489.0475285984. The cubic root of 90042023 is about 448.2102127182.

The spelling of 90042023 in words is "ninety million, forty-two thousand, twenty-three".