90823797 has 6 divisors (see below), whose sum is σ = 131189942. Its totient is φ = 60549192.

The previous prime is 90823771. The next prime is 90823807. The reversal of 90823797 is 79732809.

It can be written as a sum of positive squares in only one way, i.e., 65512836 + 25310961 = 8094^2 + 5031^2 .

It is not a de Polignac number, because 90823797 - 2¹¹ = 90821749 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 (90823717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5045758 + ... + 5045775.

Almost surely, 2^90823797 is an apocalyptic number.

It is an amenable number.

90823797 is a deficient number, since it is larger than the sum of its proper divisors (40366145).

90823797 is a wasteful number, since it uses less digits than its factorization.

90823797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10091539 (or 10091536 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 90823797 is about 9530.1519924920. The cubic root of 90823797 is about 449.5036453095.

The spelling of 90823797 in words is "ninety million, eight hundred twenty-three thousand, seven hundred ninety-seven".