90205025 has 12 divisors (see below), whose sum is σ = 112015152. Its totient is φ = 72060240.

The previous prime is 90204979. The next prime is 90205067. The reversal of 90205025 is 52050209.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-90205025 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18494 + ... + 22856.

It is an arithmetic number, because the mean of its divisors is an integer number (9334596).

Almost surely, 2^90205025 is an apocalyptic number.

It is an amenable number.

90205025 is a deficient number, since it is larger than the sum of its proper divisors (21810127).

90205025 is a wasteful number, since it uses less digits than its factorization.

90205025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5200 (or 5195 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 90205025 is about 9497.6325997587. The cubic root of 90205025 is about 448.4805128769.

The spelling of 90205025 in words is "ninety million, two hundred five thousand, twenty-five".