91693892393 has 2 divisors, whose sum is σ = 91693892394. Its totient is φ = 91693892392.

The previous prime is 91693892309. The next prime is 91693892419. The reversal of 91693892393 is 39329839619.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53015983504 + 38677908889 = 230252^2 + 196667^2 .

It is a cyclic number.

It is not a de Polignac number, because 91693892393 - 2²⁸ = 91425456937 is a prime.

It is not a weakly prime, because it can be changed into another prime (91693894393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45846946196 + 45846946197.

It is an arithmetic number, because the mean of its divisors is an integer number (45846946197).

Almost surely, 2^91693892393 is an apocalyptic number.

It is an amenable number.

91693892393 is a deficient number, since it is larger than the sum of its proper divisors (1).

91693892393 is an equidigital number, since it uses as much as digits as its factorization.

91693892393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17006112, while the sum is 62.

The spelling of 91693892393 in words is "ninety-one billion, six hundred ninety-three million, eight hundred ninety-two thousand, three hundred ninety-three".