90825799 has 4 divisors (see below), whose sum is σ = 90868536. Its totient is φ = 90783064.

The previous prime is 90825793. The next prime is 90825809. The reversal of 90825799 is 99752809.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90825799 - 2²³ = 82437191 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 (90825793) 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, 18004 + ... + 22489.

It is an arithmetic number, because the mean of its divisors is an integer number (22717134).

Almost surely, 2^90825799 is an apocalyptic number.

90825799 is a deficient number, since it is larger than the sum of its proper divisors (42737).

90825799 is a wasteful number, since it uses less digits than its factorization.

90825799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42736.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 90825799 is about 9530.2570269642. The cubic root of 90825799 is about 449.5069480404.

The spelling of 90825799 in words is "ninety million, eight hundred twenty-five thousand, seven hundred ninety-nine".