111949405 has 8 divisors (see below), whose sum is σ = 135082584. Its totient is φ = 89064000.

The previous prime is 111949381. The next prime is 111949421. The reversal of 111949405 is 504949111.

It can be written as a sum of positive squares in 4 ways, for example, as 5673924 + 106275481 = 2382^2 + 10309^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-111949405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60946 + ... + 62755.

It is an arithmetic number, because the mean of its divisors is an integer number (16885323).

Almost surely, 2^111949405 is an apocalyptic number.

It is an amenable number.

111949405 is a deficient number, since it is larger than the sum of its proper divisors (23133179).

111949405 is a wasteful number, since it uses less digits than its factorization.

111949405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123887.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 111949405 is about 10580.6145851742. The cubic root of 111949405 is about 481.9558578860.

The spelling of 111949405 in words is "one hundred eleven million, nine hundred forty-nine thousand, four hundred five".