90531973933867 has 2 divisors, whose sum is σ = 90531973933868. Its totient is φ = 90531973933866.

The previous prime is 90531973933811. The next prime is 90531973933871. The reversal of 90531973933867 is 76833937913509.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90531973933867 - 2¹⁵ = 90531973901099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90531973933867.

It is not a weakly prime, because it can be changed into another prime (90531973913867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45265986966933 + 45265986966934.

It is an arithmetic number, because the mean of its divisors is an integer number (45265986966934).

Almost surely, 2^{90531973933867} is an apocalyptic number.

90531973933867 is a deficient number, since it is larger than the sum of its proper divisors (1).

90531973933867 is an equidigital number, since it uses as much as digits as its factorization.

90531973933867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 694416240, while the sum is 73.

The spelling of 90531973933867 in words is "ninety trillion, five hundred thirty-one billion, nine hundred seventy-three million, nine hundred thirty-three thousand, eight hundred sixty-seven".