90209092 has 6 divisors (see below), whose sum is σ = 157865918. Its totient is φ = 45104544.

The previous prime is 90209087. The next prime is 90209099. The reversal of 90209092 is 29090209.

It can be written as a sum of positive squares in only one way, i.e., 76842756 + 13366336 = 8766^2 + 3656^2 .

It is not an unprimeable number, because it can be changed into a prime (90209099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11276133 + ... + 11276140.

Almost surely, 2^90209092 is an apocalyptic number.

It is an amenable number.

90209092 is a deficient number, since it is larger than the sum of its proper divisors (67656826).

90209092 is a wasteful number, since it uses less digits than its factorization.

90209092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22552277 (or 22552275 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 90209092 is about 9497.8467033323. The cubic root of 90209092 is about 448.4872528667.

The spelling of 90209092 in words is "ninety million, two hundred nine thousand, ninety-two".