91133969197 has 2 divisors, whose sum is σ = 91133969198. Its totient is φ = 91133969196.

The previous prime is 91133969183. The next prime is 91133969261. The reversal of 91133969197 is 79196933119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87678763236 + 3455205961 = 296106^2 + 58781^2 .

It is a cyclic number.

It is not a de Polignac number, because 91133969197 - 2¹⁵ = 91133936429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91133969117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45566984598 + 45566984599.

It is an arithmetic number, because the mean of its divisors is an integer number (45566984599).

Almost surely, 2^91133969197 is an apocalyptic number.

It is an amenable number.

91133969197 is a deficient number, since it is larger than the sum of its proper divisors (1).

91133969197 is an equidigital number, since it uses as much as digits as its factorization.

91133969197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2480058, while the sum is 58.

The spelling of 91133969197 in words is "ninety-one billion, one hundred thirty-three million, nine hundred sixty-nine thousand, one hundred ninety-seven".