90260881 has 2 divisors, whose sum is σ = 90260882. Its totient is φ = 90260880.

The previous prime is 90260873. The next prime is 90260893. The reversal of 90260881 is 18806209.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80281600 + 9979281 = 8960^2 + 3159^2 .

It is an emirp because it is prime and its reverse (18806209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90260881 - 2³ = 90260873 is a prime.

It is a super-2 number, since 2×90260881² = 16294053277792322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90260851) 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, 45130440 + 45130441.

It is an arithmetic number, because the mean of its divisors is an integer number (45130441).

Almost surely, 2^90260881 is an apocalyptic number.

It is an amenable number.

90260881 is a deficient number, since it is larger than the sum of its proper divisors (1).

90260881 is an equidigital number, since it uses as much as digits as its factorization.

90260881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 90260881 is about 9500.5726669501. The cubic root of 90260881 is about 448.5730618926.

The spelling of 90260881 in words is "ninety million, two hundred sixty thousand, eight hundred eighty-one".