111731393 has 4 divisors (see below), whose sum is σ = 112471488. Its totient is φ = 110991300.

The previous prime is 111731387. The next prime is 111731423. The reversal of 111731393 is 393137111.

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: 393137111 = 5981 ⋅65731.

It is a cyclic number.

It is not a de Polignac number, because 111731393 - 2⁴ = 111731377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111731593) 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, 369821 + ... + 370122.

It is an arithmetic number, because the mean of its divisors is an integer number (28117872).

Almost surely, 2^111731393 is an apocalyptic number.

It is an amenable number.

111731393 is a deficient number, since it is larger than the sum of its proper divisors (740095).

111731393 is an equidigital number, since it uses as much as digits as its factorization.

111731393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740094.

The product of its digits is 1701, while the sum is 29.

The square root of 111731393 is about 10570.3071383948. The cubic root of 111731393 is about 481.6427984858.

The spelling of 111731393 in words is "one hundred eleven million, seven hundred thirty-one thousand, three hundred ninety-three".