90808809029 has 2 divisors, whose sum is σ = 90808809030. Its totient is φ = 90808809028.

The previous prime is 90808809023. The next prime is 90808809037. The reversal of 90808809029 is 92090880809.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90808809025 + 4 = 301345^2 + 2^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90808809029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90808809023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45404404514 + 45404404515.

It is an arithmetic number, because the mean of its divisors is an integer number (45404404515).

Almost surely, 2^90808809029 is an apocalyptic number.

It is an amenable number.

90808809029 is a deficient number, since it is larger than the sum of its proper divisors (1).

90808809029 is an equidigital number, since it uses as much as digits as its factorization.

90808809029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 53.

The spelling of 90808809029 in words is "ninety billion, eight hundred eight million, eight hundred nine thousand, twenty-nine".