90254881 has 2 divisors, whose sum is σ = 90254882. Its totient is φ = 90254880.

The previous prime is 90254863. The next prime is 90254891. The reversal of 90254881 is 18845209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90155025 + 99856 = 9495^2 + 316^2 .

It is a cyclic number.

It is not a de Polignac number, because 90254881 - 2⁵ = 90254849 is a prime.

It is a super-2 number, since 2×90254881² = 16291887088648322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90254881.

It is not a weakly prime, because it can be changed into another prime (90254851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45127440 + 45127441.

It is an arithmetic number, because the mean of its divisors is an integer number (45127441).

Almost surely, 2^90254881 is an apocalyptic number.

It is an amenable number.

90254881 is a deficient number, since it is larger than the sum of its proper divisors (1).

90254881 is an equidigital number, since it uses as much as digits as its factorization.

90254881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 90254881 is about 9500.2568912635. The cubic root of 90254881 is about 448.5631221935.

The spelling of 90254881 in words is "ninety million, two hundred fifty-four thousand, eight hundred eighty-one".