90219159027797 has 2 divisors, whose sum is σ = 90219159027798. Its totient is φ = 90219159027796.

The previous prime is 90219159027757. The next prime is 90219159027817. The reversal of 90219159027797 is 79772095191209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77089558964356 + 13129600063441 = 8780066^2 + 3623479^2 .

It is a cyclic number.

It is not a de Polignac number, because 90219159027797 - 2⁶ = 90219159027733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90219159027757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45109579513898 + 45109579513899.

It is an arithmetic number, because the mean of its divisors is an integer number (45109579513899).

Almost surely, 2^{90219159027797} is an apocalyptic number.

It is an amenable number.

90219159027797 is a deficient number, since it is larger than the sum of its proper divisors (1).

90219159027797 is an equidigital number, since it uses as much as digits as its factorization.

90219159027797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45008460, while the sum is 68.

The spelling of 90219159027797 in words is "ninety trillion, two hundred nineteen billion, one hundred fifty-nine million, twenty-seven thousand, seven hundred ninety-seven".