91936638253 has 2 divisors, whose sum is σ = 91936638254. Its totient is φ = 91936638252.

The previous prime is 91936638251. The next prime is 91936638257. The reversal of 91936638253 is 35283663919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89641557604 + 2295080649 = 299402^2 + 47907^2 .

It is a cyclic number.

It is not a de Polignac number, because 91936638253 - 2¹ = 91936638251 is a prime.

Together with 91936638251, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 91936638194 and 91936638203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91936638251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45968319126 + 45968319127.

It is an arithmetic number, because the mean of its divisors is an integer number (45968319127).

Almost surely, 2^91936638253 is an apocalyptic number.

It is an amenable number.

91936638253 is a deficient number, since it is larger than the sum of its proper divisors (1).

91936638253 is an equidigital number, since it uses as much as digits as its factorization.

91936638253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6298560, while the sum is 55.

The spelling of 91936638253 in words is "ninety-one billion, nine hundred thirty-six million, six hundred thirty-eight thousand, two hundred fifty-three".