90983697523 has 2 divisors, whose sum is σ = 90983697524. Its totient is φ = 90983697522.

The previous prime is 90983697517. The next prime is 90983697557. The reversal of 90983697523 is 32579638909.

It is a weak prime.

It is an emirp because it is prime and its reverse (32579638909) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90983697523 is a prime.

It is not a weakly prime, because it can be changed into another prime (90983697583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45491848761 + 45491848762.

It is an arithmetic number, because the mean of its divisors is an integer number (45491848762).

Almost surely, 2^90983697523 is an apocalyptic number.

90983697523 is a deficient number, since it is larger than the sum of its proper divisors (1).

90983697523 is an equidigital number, since it uses as much as digits as its factorization.

90983697523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22044960, while the sum is 61.

The spelling of 90983697523 in words is "ninety billion, nine hundred eighty-three million, six hundred ninety-seven thousand, five hundred twenty-three".