111778349 has 16 divisors (see below), whose sum is σ = 125038080. Its totient is φ = 99302400.

The previous prime is 111778339. The next prime is 111778399. The reversal of 111778349 is 943877111.

It is a cyclic number.

It is not a de Polignac number, because 111778349 - 2⁴ = 111778333 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 (111778309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129092 + ... + 129954.

It is an arithmetic number, because the mean of its divisors is an integer number (7814880).

Almost surely, 2^111778349 is an apocalyptic number.

111778349 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

111778349 is a deficient number, since it is larger than the sum of its proper divisors (13259731).

111778349 is a wasteful number, since it uses less digits than its factorization.

111778349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300.

The product of its digits is 42336, while the sum is 41.

The square root of 111778349 is about 10572.5280325947. The cubic root of 111778349 is about 481.7102604323.

The spelling of 111778349 in words is "one hundred eleven million, seven hundred seventy-eight thousand, three hundred forty-nine".