91939324753 has 2 divisors, whose sum is σ = 91939324754. Its totient is φ = 91939324752.

The previous prime is 91939324679. The next prime is 91939324823. The reversal of 91939324753 is 35742393919.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65744549649 + 26194775104 = 256407^2 + 161848^2 .

It is a cyclic number.

It is not a de Polignac number, because 91939324753 - 2²¹ = 91937227601 is a prime.

It is a super-2 number, since 2×91939324753² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 91939324694 and 91939324703.

It is not a weakly prime, because it can be changed into another prime (91939324853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45969662376 + 45969662377.

It is an arithmetic number, because the mean of its divisors is an integer number (45969662377).

Almost surely, 2^91939324753 is an apocalyptic number.

It is an amenable number.

91939324753 is a deficient number, since it is larger than the sum of its proper divisors (1).

91939324753 is an equidigital number, since it uses as much as digits as its factorization.

91939324753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5511240, while the sum is 55.

The spelling of 91939324753 in words is "ninety-one billion, nine hundred thirty-nine million, three hundred twenty-four thousand, seven hundred fifty-three".