90876281 has 2 divisors, whose sum is σ = 90876282. Its totient is φ = 90876280.

The previous prime is 90876229. The next prime is 90876287. The reversal of 90876281 is 18267809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90535225 + 341056 = 9515^2 + 584^2 .

It is a cyclic number.

It is not a de Polignac number, because 90876281 - 2⁶ = 90876217 is a prime.

It is a super-2 number, since 2×90876281² = 16516996896781922, which contains 22 as substring.

It is a Chen prime.

It is equal to p_5264888 and since 90876281 and 5264888 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (90876287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45438140 + 45438141.

It is an arithmetic number, because the mean of its divisors is an integer number (45438141).

Almost surely, 2^90876281 is an apocalyptic number.

It is an amenable number.

90876281 is a deficient number, since it is larger than the sum of its proper divisors (1).

90876281 is an equidigital number, since it uses as much as digits as its factorization.

90876281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 90876281 is about 9532.9051710378. The cubic root of 90876281 is about 449.5902129539.

The spelling of 90876281 in words is "ninety million, eight hundred seventy-six thousand, two hundred eighty-one".