90366281 has 2 divisors, whose sum is σ = 90366282. Its totient is φ = 90366280.

The previous prime is 90366253. The next prime is 90366293. The reversal of 90366281 is 18266309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90250000 + 116281 = 9500^2 + 341^2 .

It is an emirp because it is prime and its reverse (18266309) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90366281 - 2²² = 86171977 is a prime.

It is a super-2 number, since 2×90366281² = 16332129483541922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90365281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45183140 + 45183141.

It is an arithmetic number, because the mean of its divisors is an integer number (45183141).

Almost surely, 2^90366281 is an apocalyptic number.

It is an amenable number.

90366281 is a deficient number, since it is larger than the sum of its proper divisors (1).

90366281 is an equidigital number, since it uses as much as digits as its factorization.

90366281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 90366281 is about 9506.1180825824. The cubic root of 90366281 is about 448.7475974866.

The spelling of 90366281 in words is "ninety million, three hundred sixty-six thousand, two hundred eighty-one".