90490953517 has 2 divisors, whose sum is σ = 90490953518. Its totient is φ = 90490953516.

The previous prime is 90490953481. The next prime is 90490953547. The reversal of 90490953517 is 71535909409.

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., 82454548201 + 8036405316 = 287149^2 + 89646^2 .

It is a cyclic number.

It is not a de Polignac number, because 90490953517 - 2¹⁹ = 90490429229 is a prime.

It is a super-2 number, since 2×90490953517² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90490953547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45245476758 + 45245476759.

It is an arithmetic number, because the mean of its divisors is an integer number (45245476759).

Almost surely, 2^90490953517 is an apocalyptic number.

It is an amenable number.

90490953517 is a deficient number, since it is larger than the sum of its proper divisors (1).

90490953517 is an equidigital number, since it uses as much as digits as its factorization.

90490953517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1530900, while the sum is 52.

The spelling of 90490953517 in words is "ninety billion, four hundred ninety million, nine hundred fifty-three thousand, five hundred seventeen".