90008623 has 2 divisors, whose sum is σ = 90008624. Its totient is φ = 90008622.

The previous prime is 90008621. The next prime is 90008627. The reversal of 90008623 is 32680009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90008623 - 2¹ = 90008621 is a prime.

It is a super-2 number, since 2×90008623² = 16203104428712258, which contains 22 as substring.

Together with 90008621, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 90008591 and 90008600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90008621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45004311 + 45004312.

It is an arithmetic number, because the mean of its divisors is an integer number (45004312).

Almost surely, 2^90008623 is an apocalyptic number.

90008623 is a deficient number, since it is larger than the sum of its proper divisors (1).

90008623 is an equidigital number, since it uses as much as digits as its factorization.

90008623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 90008623 is about 9487.2874416242. The cubic root of 90008623 is about 448.1547864776.

The spelling of 90008623 in words is "ninety million, eight thousand, six hundred twenty-three".