90856427 has 2 divisors, whose sum is σ = 90856428. Its totient is φ = 90856426.

The previous prime is 90856393. The next prime is 90856429. The reversal of 90856427 is 72465809.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90856427 is a prime.

Together with 90856429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90856429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45428213 + 45428214.

It is an arithmetic number, because the mean of its divisors is an integer number (45428214).

Almost surely, 2^90856427 is an apocalyptic number.

90856427 is a deficient number, since it is larger than the sum of its proper divisors (1).

90856427 is an equidigital number, since it uses as much as digits as its factorization.

90856427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 90856427 is about 9531.8637736804. The cubic root of 90856427 is about 449.5574694844.

The spelling of 90856427 in words is "ninety million, eight hundred fifty-six thousand, four hundred twenty-seven".