90395281 has 2 divisors, whose sum is σ = 90395282. Its totient is φ = 90395280.

The previous prime is 90395269. The next prime is 90395309. The reversal of 90395281 is 18259309.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54154881 + 36240400 = 7359^2 + 6020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90395281 is a prime.

It is a super-2 number, since 2×90395281² = 16342613654137922, 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 90395281.

It is not a weakly prime, because it can be changed into another prime (90395251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45197640 + 45197641.

It is an arithmetic number, because the mean of its divisors is an integer number (45197641).

Almost surely, 2^90395281 is an apocalyptic number.

It is an amenable number.

90395281 is a deficient number, since it is larger than the sum of its proper divisors (1).

90395281 is an equidigital number, since it uses as much as digits as its factorization.

90395281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 90395281 is about 9507.6432936875. The cubic root of 90395281 is about 448.7955958046.

The spelling of 90395281 in words is "ninety million, three hundred ninety-five thousand, two hundred eighty-one".