91633949412893 has 2 divisors, whose sum is σ = 91633949412894. Its totient is φ = 91633949412892.

The previous prime is 91633949412883. The next prime is 91633949412923. The reversal of 91633949412893 is 39821494933619.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90296403963364 + 1337545449529 = 9502442^2 + 1156523^2 .

It is a cyclic number.

It is not a de Polignac number, because 91633949412893 - 2¹² = 91633949408797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91633949412883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45816974706446 + 45816974706447.

It is an arithmetic number, because the mean of its divisors is an integer number (45816974706447).

Almost surely, 2^{91633949412893} is an apocalyptic number.

It is an amenable number.

91633949412893 is a deficient number, since it is larger than the sum of its proper divisors (1).

91633949412893 is an equidigital number, since it uses as much as digits as its factorization.

91633949412893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272097792, while the sum is 71.

The spelling of 91633949412893 in words is "ninety-one trillion, six hundred thirty-three billion, nine hundred forty-nine million, four hundred twelve thousand, eight hundred ninety-three".