91269843761 has 2 divisors, whose sum is σ = 91269843762. Its totient is φ = 91269843760.

The previous prime is 91269843737. The next prime is 91269843823. The reversal of 91269843761 is 16734896219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89688270400 + 1581573361 = 299480^2 + 39769^2 .

It is a cyclic number.

It is not a de Polignac number, because 91269843761 - 2⁶ = 91269843697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91269843697 and 91269843706.

It is not a weakly prime, because it can be changed into another prime (91269843061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45634921880 + 45634921881.

It is an arithmetic number, because the mean of its divisors is an integer number (45634921881).

Almost surely, 2^91269843761 is an apocalyptic number.

It is an amenable number.

91269843761 is a deficient number, since it is larger than the sum of its proper divisors (1).

91269843761 is an equidigital number, since it uses as much as digits as its factorization.

91269843761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 56.

The spelling of 91269843761 in words is "ninety-one billion, two hundred sixty-nine million, eight hundred forty-three thousand, seven hundred sixty-one".