90664459 has 4 divisors (see below), whose sum is σ = 94606416. Its totient is φ = 86722504.

The previous prime is 90664439. The next prime is 90664471. The reversal of 90664459 is 95446609.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90664459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90664439) 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, 1970944 + ... + 1970989.

It is an arithmetic number, because the mean of its divisors is an integer number (23651604).

Almost surely, 2^90664459 is an apocalyptic number.

90664459 is a deficient number, since it is larger than the sum of its proper divisors (3941957).

90664459 is a wasteful number, since it uses less digits than its factorization.

90664459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3941956.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 90664459 is about 9521.7886449973. The cubic root of 90664459 is about 449.2406271015.

The spelling of 90664459 in words is "ninety million, six hundred sixty-four thousand, four hundred fifty-nine".