111397706309 has 4 divisors (see below), whose sum is σ = 112966688160. Its totient is φ = 109828724460.

The previous prime is 111397706297. The next prime is 111397706341. The reversal of 111397706309 is 903607793111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 903607793111 = 127 ⋅7115021993.

It is a cyclic number.

It is not a de Polignac number, because 111397706309 - 2²⁰ = 111396657733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111397706009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 784490819 + ... + 784490960.

It is an arithmetic number, because the mean of its divisors is an integer number (28241672040).

Almost surely, 2^111397706309 is an apocalyptic number.

It is an amenable number.

111397706309 is a deficient number, since it is larger than the sum of its proper divisors (1568981851).

111397706309 is an equidigital number, since it uses as much as digits as its factorization.

111397706309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568981850.

The product of its (nonzero) digits is 214326, while the sum is 47.

The spelling of 111397706309 in words is "one hundred eleven billion, three hundred ninety-seven million, seven hundred six thousand, three hundred nine".