90039598897 has 2 divisors, whose sum is σ = 90039598898. Its totient is φ = 90039598896.

The previous prime is 90039598871. The next prime is 90039598967. The reversal of 90039598897 is 79889593009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86907629601 + 3131969296 = 294801^2 + 55964^2 .

It is a cyclic number.

It is not a de Polignac number, because 90039598897 - 2¹¹ = 90039596849 is a prime.

It is not a weakly prime, because it can be changed into another prime (90039598697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45019799448 + 45019799449.

It is an arithmetic number, because the mean of its divisors is an integer number (45019799449).

Almost surely, 2^90039598897 is an apocalyptic number.

It is an amenable number.

90039598897 is a deficient number, since it is larger than the sum of its proper divisors (1).

90039598897 is an equidigital number, since it uses as much as digits as its factorization.

90039598897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44089920, while the sum is 67.

The spelling of 90039598897 in words is "ninety billion, thirty-nine million, five hundred ninety-eight thousand, eight hundred ninety-seven".