111729399 has 4 divisors (see below), whose sum is σ = 148972536. Its totient is φ = 74486264.

The previous prime is 111729383. The next prime is 111729407. The reversal of 111729399 is 993927111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111729399 - 2⁴ = 111729383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111729399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111729349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18621564 + ... + 18621569.

It is an arithmetic number, because the mean of its divisors is an integer number (37243134).

Almost surely, 2^111729399 is an apocalyptic number.

111729399 is a deficient number, since it is larger than the sum of its proper divisors (37243137).

111729399 is an equidigital number, since it uses as much as digits as its factorization.

111729399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37243136.

The product of its digits is 30618, while the sum is 42.

The square root of 111729399 is about 10570.2128171575. The cubic root of 111729399 is about 481.6399332765.

The spelling of 111729399 in words is "one hundred eleven million, seven hundred twenty-nine thousand, three hundred ninety-nine".