90437023 has 2 divisors, whose sum is σ = 90437024. Its totient is φ = 90437022.

The previous prime is 90436967. The next prime is 90437033. The reversal of 90437023 is 32073409.

It is a strong prime.

It is an emirp because it is prime and its reverse (32073409) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90437023 is a prime.

It is equal to p_5240926 and since 90437023 and 5240926 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 90436982 and 90437000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90437033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45218511 + 45218512.

It is an arithmetic number, because the mean of its divisors is an integer number (45218512).

Almost surely, 2^90437023 is an apocalyptic number.

90437023 is a deficient number, since it is larger than the sum of its proper divisors (1).

90437023 is an equidigital number, since it uses as much as digits as its factorization.

90437023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 90437023 is about 9509.8382215472. The cubic root of 90437023 is about 448.8646655715.

The spelling of 90437023 in words is "ninety million, four hundred thirty-seven thousand, twenty-three".