90097877689 has 2 divisors, whose sum is σ = 90097877690. Its totient is φ = 90097877688.

The previous prime is 90097877657. The next prime is 90097877711. The reversal of 90097877689 is 98677879009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90012000400 + 85877289 = 300020^2 + 9267^2 .

It is a cyclic number.

It is not a de Polignac number, because 90097877689 - 2⁵ = 90097877657 is a prime.

It is not a weakly prime, because it can be changed into another prime (90097877609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45048938844 + 45048938845.

It is an arithmetic number, because the mean of its divisors is an integer number (45048938845).

Almost surely, 2^90097877689 is an apocalyptic number.

It is an amenable number.

90097877689 is a deficient number, since it is larger than the sum of its proper divisors (1).

90097877689 is an equidigital number, since it uses as much as digits as its factorization.

90097877689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96018048, while the sum is 70.

The spelling of 90097877689 in words is "ninety billion, ninety-seven million, eight hundred seventy-seven thousand, six hundred eighty-nine".