90997241 has 2 divisors, whose sum is σ = 90997242. Its totient is φ = 90997240.

The previous prime is 90997199. The next prime is 90997253. The reversal of 90997241 is 14279909.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65545216 + 25452025 = 8096^2 + 5045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90997241 is a prime.

It is a super-3 number, since 3×90997241³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45498620 + 45498621.

It is an arithmetic number, because the mean of its divisors is an integer number (45498621).

Almost surely, 2^90997241 is an apocalyptic number.

It is an amenable number.

90997241 is a deficient number, since it is larger than the sum of its proper divisors (1).

90997241 is an equidigital number, since it uses as much as digits as its factorization.

90997241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 90997241 is about 9539.2474021801. The cubic root of 90997241 is about 449.7895987598.

The spelling of 90997241 in words is "ninety million, nine hundred ninety-seven thousand, two hundred forty-one".