90825579 has 12 divisors (see below), whose sum is σ = 141284416. Its totient is φ = 55892592.

The previous prime is 90825571. The next prime is 90825601. The reversal of 90825579 is 97552809.

It is a happy number.

90825579 is a `hidden beast` number, since 90 + 8 + 2 + 557 + 9 = 666.

It is not a de Polignac number, because 90825579 - 2³ = 90825571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90825571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 388027 + ... + 388260.

Almost surely, 2^90825579 is an apocalyptic number.

90825579 is a deficient number, since it is larger than the sum of its proper divisors (50458837).

90825579 is a wasteful number, since it uses less digits than its factorization.

90825579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776306 (or 776303 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 90825579 is about 9530.2454847711. The cubic root of 90825579 is about 449.5065851053.

The spelling of 90825579 in words is "ninety million, eight hundred twenty-five thousand, five hundred seventy-nine".