90398823 has 8 divisors (see below), whose sum is σ = 121638000. Its totient is φ = 59712768.

The previous prime is 90398801. The next prime is 90398839. The reversal of 90398823 is 32889309.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90398823 - 2²⁵ = 56844391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90398323) 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 7 ways as a sum of consecutive naturals, for example, 137898 + ... + 138551.

It is an arithmetic number, because the mean of its divisors is an integer number (15204750).

Almost surely, 2^90398823 is an apocalyptic number.

90398823 is a deficient number, since it is larger than the sum of its proper divisors (31239177).

90398823 is a wasteful number, since it uses less digits than its factorization.

90398823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276561.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 90398823 is about 9507.8295630496. The cubic root of 90398823 is about 448.8014575164.

The spelling of 90398823 in words is "ninety million, three hundred ninety-eight thousand, eight hundred twenty-three".