90618851 has 2 divisors, whose sum is σ = 90618852. Its totient is φ = 90618850.

The previous prime is 90618841. The next prime is 90618889. The reversal of 90618851 is 15881609.

It is an a-pointer prime, because the next prime (90618889) can be obtained adding 90618851 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90618851 - 2¹⁰ = 90617827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90618841) 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, 45309425 + 45309426.

It is an arithmetic number, because the mean of its divisors is an integer number (45309426).

Almost surely, 2^90618851 is an apocalyptic number.

90618851 is a deficient number, since it is larger than the sum of its proper divisors (1).

90618851 is an equidigital number, since it uses as much as digits as its factorization.

90618851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 90618851 is about 9519.3934155491. The cubic root of 90618851 is about 449.1652855498.

The spelling of 90618851 in words is "ninety million, six hundred eighteen thousand, eight hundred fifty-one".