90605663 has 4 divisors (see below), whose sum is σ = 91539840. Its totient is φ = 89671488.

The previous prime is 90605633. The next prime is 90605677. The reversal of 90605663 is 36650609.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90605663 - 2⁸ = 90605407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90605633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466943 + ... + 467136.

It is an arithmetic number, because the mean of its divisors is an integer number (22884960).

Almost surely, 2^90605663 is an apocalyptic number.

90605663 is a deficient number, since it is larger than the sum of its proper divisors (934177).

90605663 is an equidigital number, since it uses as much as digits as its factorization.

90605663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934176.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 90605663 is about 9518.7006991501. The cubic root of 90605663 is about 449.1434950904.

The spelling of 90605663 in words is "ninety million, six hundred five thousand, six hundred sixty-three".