91275486769 has 2 divisors, whose sum is σ = 91275486770. Its totient is φ = 91275486768.

The previous prime is 91275486749. The next prime is 91275486781. The reversal of 91275486769 is 96768457219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71192912400 + 20082574369 = 266820^2 + 141713^2 .

It is a cyclic number.

It is not a de Polignac number, because 91275486769 - 2²¹ = 91273389617 is a prime.

It is a super-2 number, since 2×91275486769² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91275486769.

It is not a weakly prime, because it can be changed into another prime (91275486749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45637743384 + 45637743385.

It is an arithmetic number, because the mean of its divisors is an integer number (45637743385).

Almost surely, 2^91275486769 is an apocalyptic number.

It is an amenable number.

91275486769 is a deficient number, since it is larger than the sum of its proper divisors (1).

91275486769 is an equidigital number, since it uses as much as digits as its factorization.

91275486769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45722880, while the sum is 64.

The spelling of 91275486769 in words is "ninety-one billion, two hundred seventy-five million, four hundred eighty-six thousand, seven hundred sixty-nine".