113205372391 has 2 divisors, whose sum is σ = 113205372392. Its totient is φ = 113205372390.

The previous prime is 113205372389. The next prime is 113205372407. The reversal of 113205372391 is 193273502311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 113205372391 - 2¹ = 113205372389 is a prime.

Together with 113205372389, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 113205372391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113205372991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56602686195 + 56602686196.

It is an arithmetic number, because the mean of its divisors is an integer number (56602686196).

Almost surely, 2^113205372391 is an apocalyptic number.

113205372391 is a deficient number, since it is larger than the sum of its proper divisors (1).

113205372391 is an equidigital number, since it uses as much as digits as its factorization.

113205372391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

The spelling of 113205372391 in words is "one hundred thirteen billion, two hundred five million, three hundred seventy-two thousand, three hundred ninety-one".