91269843823 has 2 divisors, whose sum is σ = 91269843824. Its totient is φ = 91269843822.

The previous prime is 91269843761. The next prime is 91269843827. The reversal of 91269843823 is 32834896219.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91269843823 - 2²¹ = 91267746671 is a prime.

It is a super-2 number, since 2×91269843823² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91269843827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45634921911 + 45634921912.

It is an arithmetic number, because the mean of its divisors is an integer number (45634921912).

Almost surely, 2^91269843823 is an apocalyptic number.

91269843823 is a deficient number, since it is larger than the sum of its proper divisors (1).

91269843823 is an equidigital number, since it uses as much as digits as its factorization.

91269843823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4478976, while the sum is 55.

The spelling of 91269843823 in words is "ninety-one billion, two hundred sixty-nine million, eight hundred forty-three thousand, eight hundred twenty-three".