90927281 has 8 divisors (see below), whose sum is σ = 93072000. Its totient is φ = 88791408.

The previous prime is 90927259. The next prime is 90927289. The reversal of 90927281 is 18272909.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90927281 is a prime.

It is a super-2 number, since 2×90927281² = 16535540860105922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90927289) 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, 21515 + ... + 25391.

It is an arithmetic number, because the mean of its divisors is an integer number (11634000).

Almost surely, 2^90927281 is an apocalyptic number.

It is an amenable number.

90927281 is a deficient number, since it is larger than the sum of its proper divisors (2144719).

90927281 is a wasteful number, since it uses less digits than its factorization.

90927281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4423.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 90927281 is about 9535.5797411589. The cubic root of 90927281 is about 449.6743009493.

The spelling of 90927281 in words is "ninety million, nine hundred twenty-seven thousand, two hundred eighty-one".