90173959 has 2 divisors, whose sum is σ = 90173960. Its totient is φ = 90173958.

The previous prime is 90173953. The next prime is 90173977. The reversal of 90173959 is 95937109.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90173959 - 2⁵ = 90173927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90173953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45086979 + 45086980.

It is an arithmetic number, because the mean of its divisors is an integer number (45086980).

Almost surely, 2^90173959 is an apocalyptic number.

90173959 is a deficient number, since it is larger than the sum of its proper divisors (1).

90173959 is an equidigital number, since it uses as much as digits as its factorization.

90173959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 90173959 is about 9495.9969987358. The cubic root of 90173959 is about 448.4290224146.

The spelling of 90173959 in words is "ninety million, one hundred seventy-three thousand, nine hundred fifty-nine".