90581147 has 2 divisors, whose sum is σ = 90581148. Its totient is φ = 90581146.

The previous prime is 90581111. The next prime is 90581149. The reversal of 90581147 is 74118509.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90581147 - 2¹⁰ = 90580123 is a prime.

Together with 90581149, 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 (90581149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45290573 + 45290574.

It is an arithmetic number, because the mean of its divisors is an integer number (45290574).

Almost surely, 2^90581147 is an apocalyptic number.

90581147 is a deficient number, since it is larger than the sum of its proper divisors (1).

90581147 is an equidigital number, since it uses as much as digits as its factorization.

90581147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 90581147 is about 9517.4128312268. The cubic root of 90581147 is about 449.1029818199.

The spelling of 90581147 in words is "ninety million, five hundred eighty-one thousand, one hundred forty-seven".