90791213033 has 2 divisors, whose sum is σ = 90791213034. Its totient is φ = 90791213032.

The previous prime is 90791213011. The next prime is 90791213059. The reversal of 90791213033 is 33031219709.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59940749584 + 30850463449 = 244828^2 + 175643^2 .

It is an emirp because it is prime and its reverse (33031219709) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90791213033 - 2⁶ = 90791212969 is a prime.

It is not a weakly prime, because it can be changed into another prime (90791213533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45395606516 + 45395606517.

It is an arithmetic number, because the mean of its divisors is an integer number (45395606517).

Almost surely, 2^90791213033 is an apocalyptic number.

It is an amenable number.

90791213033 is a deficient number, since it is larger than the sum of its proper divisors (1).

90791213033 is an equidigital number, since it uses as much as digits as its factorization.

90791213033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 38.

The spelling of 90791213033 in words is "ninety billion, seven hundred ninety-one million, two hundred thirteen thousand, thirty-three".