90569663 has 4 divisors (see below), whose sum is σ = 90958608. Its totient is φ = 90180720.

The previous prime is 90569641. The next prime is 90569701. The reversal of 90569663 is 36696509.

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 90569663 - 2¹² = 90565567 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 (90569263) 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, 194123 + ... + 194588.

It is an arithmetic number, because the mean of its divisors is an integer number (22739652).

Almost surely, 2^90569663 is an apocalyptic number.

90569663 is a deficient number, since it is larger than the sum of its proper divisors (388945).

90569663 is a wasteful number, since it uses less digits than its factorization.

90569663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388944.

The product of its (nonzero) digits is 262440, while the sum is 44.

The square root of 90569663 is about 9516.8094968850. The cubic root of 90569663 is about 449.0840017238.

The spelling of 90569663 in words is "ninety million, five hundred sixty-nine thousand, six hundred sixty-three".