91320433201 has 2 divisors, whose sum is σ = 91320433202. Its totient is φ = 91320433200.

The previous prime is 91320433123. The next prime is 91320433241. The reversal of 91320433201 is 10233402319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81430329600 + 9890103601 = 285360^2 + 99449^2 .

It is a cyclic number.

It is not a de Polignac number, because 91320433201 - 2¹⁹ = 91319908913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91320433201.

It is not a weakly prime, because it can be changed into another prime (91320433241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45660216600 + 45660216601.

It is an arithmetic number, because the mean of its divisors is an integer number (45660216601).

Almost surely, 2^91320433201 is an apocalyptic number.

It is an amenable number.

91320433201 is a deficient number, since it is larger than the sum of its proper divisors (1).

91320433201 is an equidigital number, since it uses as much as digits as its factorization.

91320433201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 91320433201 in words is "ninety-one billion, three hundred twenty million, four hundred thirty-three thousand, two hundred one".