90808801 has 2 divisors, whose sum is σ = 90808802. Its totient is φ = 90808800.

The previous prime is 90808799. The next prime is 90808829. The reversal of 90808801 is 10880809.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84658401 + 6150400 = 9201^2 + 2480^2 .

It is a cyclic number.

It is not a de Polignac number, because 90808801 - 2¹ = 90808799 is a prime.

Together with 90808799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (90808871) 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, 45404400 + 45404401.

It is an arithmetic number, because the mean of its divisors is an integer number (45404401).

Almost surely, 2^90808801 is an apocalyptic number.

It is an amenable number.

90808801 is a deficient number, since it is larger than the sum of its proper divisors (1).

90808801 is an equidigital number, since it uses as much as digits as its factorization.

90808801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 90808801 is about 9529.3651939675. The cubic root of 90808801 is about 449.4789046288.

The spelling of 90808801 in words is "ninety million, eight hundred eight thousand, eight hundred one".