90506851 has 2 divisors, whose sum is σ = 90506852. Its totient is φ = 90506850.

The previous prime is 90506839. The next prime is 90506893. The reversal of 90506851 is 15860509.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90506851 - 2²³ = 82118243 is a prime.

It is not a weakly prime, because it can be changed into another prime (90509851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45253425 + 45253426.

It is an arithmetic number, because the mean of its divisors is an integer number (45253426).

Almost surely, 2^90506851 is an apocalyptic number.

90506851 is a deficient number, since it is larger than the sum of its proper divisors (1).

90506851 is an equidigital number, since it uses as much as digits as its factorization.

90506851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 90506851 is about 9513.5088689715. The cubic root of 90506851 is about 448.9801612589.

The spelling of 90506851 in words is "ninety million, five hundred six thousand, eight hundred fifty-one".