90691042241 has 2 divisors, whose sum is σ = 90691042242. Its totient is φ = 90691042240.

The previous prime is 90691042229. The next prime is 90691042291. The reversal of 90691042241 is 14224019609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87692384641 + 2998657600 = 296129^2 + 54760^2 .

It is a cyclic number.

It is not a de Polignac number, because 90691042241 - 2¹⁴ = 90691025857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90691042195 and 90691042204.

It is not a weakly prime, because it can be changed into another prime (90691042201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45345521120 + 45345521121.

It is an arithmetic number, because the mean of its divisors is an integer number (45345521121).

Almost surely, 2^90691042241 is an apocalyptic number.

It is an amenable number.

90691042241 is a deficient number, since it is larger than the sum of its proper divisors (1).

90691042241 is an equidigital number, since it uses as much as digits as its factorization.

90691042241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 90691042241 in words is "ninety billion, six hundred ninety-one million, forty-two thousand, two hundred forty-one".