90542823 has 8 divisors (see below), whose sum is σ = 137970048. Its totient is φ = 51738744.

The previous prime is 90542819. The next prime is 90542863. The reversal of 90542823 is 32824509.

It is a happy number.

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

It is not a de Polignac number, because 90542823 - 2² = 90542819 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90542863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2155761 + ... + 2155802.

It is an arithmetic number, because the mean of its divisors is an integer number (17246256).

Almost surely, 2^90542823 is an apocalyptic number.

90542823 is a deficient number, since it is larger than the sum of its proper divisors (47427225).

90542823 is a wasteful number, since it uses less digits than its factorization.

90542823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4311573.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 90542823 is about 9515.3992559430. The cubic root of 90542823 is about 449.0396358546.

The spelling of 90542823 in words is "ninety million, five hundred forty-two thousand, eight hundred twenty-three".