90418799 has 2 divisors, whose sum is σ = 90418800. Its totient is φ = 90418798.

The previous prime is 90418753. The next prime is 90418813. The reversal of 90418799 is 99781409.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90418799 - 2²⁰ = 89370223 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90418399) 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, 45209399 + 45209400.

It is an arithmetic number, because the mean of its divisors is an integer number (45209400).

Almost surely, 2^90418799 is an apocalyptic number.

90418799 is a deficient number, since it is larger than the sum of its proper divisors (1).

90418799 is an equidigital number, since it uses as much as digits as its factorization.

90418799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 90418799 is about 9508.8800076560. The cubic root of 90418799 is about 448.8345132477.

The spelling of 90418799 in words is "ninety million, four hundred eighteen thousand, seven hundred ninety-nine".