90098823 has 4 divisors (see below), whose sum is σ = 120131768. Its totient is φ = 60065880.

The previous prime is 90098819. The next prime is 90098837. The reversal of 90098823 is 32889009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32889009 = 3 ⋅10963003.

It is not a de Polignac number, because 90098823 - 2² = 90098819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90098873) 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, 15016468 + ... + 15016473.

It is an arithmetic number, because the mean of its divisors is an integer number (30032942).

Almost surely, 2^90098823 is an apocalyptic number.

90098823 is a deficient number, since it is larger than the sum of its proper divisors (30032945).

90098823 is a wasteful number, since it uses less digits than its factorization.

90098823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30032944.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 90098823 is about 9492.0399809525. The cubic root of 90098823 is about 448.3044390506.

The spelling of 90098823 in words is "ninety million, ninety-eight thousand, eight hundred twenty-three".