90283181 has 2 divisors, whose sum is σ = 90283182. Its totient is φ = 90283180.

The previous prime is 90283163. The next prime is 90283183. The reversal of 90283181 is 18138209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59923081 + 30360100 = 7741^2 + 5510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90283181 is a prime.

It is a super-2 number, since 2×90283181² = 16302105542957522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 90283183, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90283183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45141590 + 45141591.

It is an arithmetic number, because the mean of its divisors is an integer number (45141591).

Almost surely, 2^90283181 is an apocalyptic number.

It is an amenable number.

90283181 is a deficient number, since it is larger than the sum of its proper divisors (1).

90283181 is an equidigital number, since it uses as much as digits as its factorization.

90283181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 90283181 is about 9501.7462079346. The cubic root of 90283181 is about 448.6100005807.

The spelling of 90283181 in words is "ninety million, two hundred eighty-three thousand, one hundred eighty-one".