90459566 has 4 divisors (see below), whose sum is σ = 135689352. Its totient is φ = 45229782.

The previous prime is 90459563. The next prime is 90459599. The reversal of 90459566 is 66595409.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90459563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22614890 + ... + 22614893.

It is an arithmetic number, because the mean of its divisors is an integer number (33922338).

Almost surely, 2^90459566 is an apocalyptic number.

90459566 is a deficient number, since it is larger than the sum of its proper divisors (45229786).

90459566 is a wasteful number, since it uses less digits than its factorization.

90459566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45229785.

The product of its (nonzero) digits is 291600, while the sum is 44.

The square root of 90459566 is about 9511.0233939361. The cubic root of 90459566 is about 448.9019582465.

The spelling of 90459566 in words is "ninety million, four hundred fifty-nine thousand, five hundred sixty-six".