90861823 has 8 divisors (see below), whose sum is σ = 98128800. Its totient is φ = 83634528.

The previous prime is 90861811. The next prime is 90861833. The reversal of 90861823 is 32816809.

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

It is a cyclic number.

It is not a de Polignac number, because 90861823 - 2²¹ = 88764671 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 (90861803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5068 + ... + 14401.

It is an arithmetic number, because the mean of its divisors is an integer number (12266100).

Almost surely, 2^90861823 is an apocalyptic number.

90861823 is a deficient number, since it is larger than the sum of its proper divisors (7266977).

90861823 is a wasteful number, since it uses less digits than its factorization.

90861823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19841.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 90861823 is about 9532.1468201030. The cubic root of 90861823 is about 449.5663691083.

The spelling of 90861823 in words is "ninety million, eight hundred sixty-one thousand, eight hundred twenty-three".