90925281 has 8 divisors (see below), whose sum is σ = 134704160. Its totient is φ = 60616836.

The previous prime is 90925273. The next prime is 90925291. The reversal of 90925281 is 18252909.

It is not a de Polignac number, because 90925281 - 2³ = 90925273 is a prime.

It is a super-2 number, since 2×90925281² = 16534813449857922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90925271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1683775 + ... + 1683828.

It is an arithmetic number, because the mean of its divisors is an integer number (16838020).

Almost surely, 2^90925281 is an apocalyptic number.

It is an amenable number.

90925281 is a deficient number, since it is larger than the sum of its proper divisors (43778879).

90925281 is a wasteful number, since it uses less digits than its factorization.

90925281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367612 (or 3367606 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 90925281 is about 9535.4748701887. The cubic root of 90925281 is about 449.6710039733.

The spelling of 90925281 in words is "ninety million, nine hundred twenty-five thousand, two hundred eighty-one".