90804646 has 4 divisors (see below), whose sum is σ = 136206972. Its totient is φ = 45402322.

The previous prime is 90804643. The next prime is 90804671. The reversal of 90804646 is 64640809.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64640809 = 3023 ⋅21383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90804643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22701160 + ... + 22701163.

It is an arithmetic number, because the mean of its divisors is an integer number (34051743).

Almost surely, 2^90804646 is an apocalyptic number.

90804646 is a deficient number, since it is larger than the sum of its proper divisors (45402326).

90804646 is a wasteful number, since it uses less digits than its factorization.

90804646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45402325.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 90804646 is about 9529.1471811490. The cubic root of 90804646 is about 449.4720491503.

The spelling of 90804646 in words is "ninety million, eight hundred four thousand, six hundred forty-six".