90204619 has 4 divisors (see below), whose sum is σ = 91080496. Its totient is φ = 89328744.

The previous prime is 90204607. The next prime is 90204629. The reversal of 90204619 is 91640209.

It is a happy number.

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 90204619 - 2²³ = 81816011 is a prime.

It is a super-2 number, since 2×90204619² = 16273746577870322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90204629) 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 in 3 ways as a sum of consecutive naturals, for example, 437784 + ... + 437989.

It is an arithmetic number, because the mean of its divisors is an integer number (22770124).

Almost surely, 2^90204619 is an apocalyptic number.

90204619 is a deficient number, since it is larger than the sum of its proper divisors (875877).

90204619 is a wasteful number, since it uses less digits than its factorization.

90204619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875876.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 90204619 is about 9497.6112259873. The cubic root of 90204619 is about 448.4798400269.

The spelling of 90204619 in words is "ninety million, two hundred four thousand, six hundred nineteen".