111405389 has 8 divisors (see below), whose sum is σ = 115700640. Its totient is φ = 107187696.

The previous prime is 111405367. The next prime is 111405401. The reversal of 111405389 is 983504111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111405389 - 2¹² = 111401293 is a prime.

It is a super-2 number, since 2×111405389² = 24822321396482642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111405689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16454 + ... + 22215.

It is an arithmetic number, because the mean of its divisors is an integer number (14462580).

Almost surely, 2^111405389 is an apocalyptic number.

It is an amenable number.

111405389 is a deficient number, since it is larger than the sum of its proper divisors (4295251).

111405389 is an equidigital number, since it uses as much as digits as its factorization.

111405389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38779.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 111405389 is about 10554.8751295314. The cubic root of 111405389 is about 481.1739047841.

The spelling of 111405389 in words is "one hundred eleven million, four hundred five thousand, three hundred eighty-nine".