111978807 has 8 divisors (see below), whose sum is σ = 149399280. Its totient is φ = 74605440.

The previous prime is 111978791. The next prime is 111978809. The reversal of 111978807 is 708879111.

It is a happy number.

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

It is not a de Polignac number, because 111978807 - 2⁴ = 111978791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111978809) 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, 5794 + ... + 16047.

It is an arithmetic number, because the mean of its divisors is an integer number (18674910).

Almost surely, 2^111978807 is an apocalyptic number.

111978807 is a deficient number, since it is larger than the sum of its proper divisors (37420473).

111978807 is a wasteful number, since it uses less digits than its factorization.

111978807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23553.

The product of its (nonzero) digits is 28224, while the sum is 42.

The square root of 111978807 is about 10582.0039217532. The cubic root of 111978807 is about 481.9980472594.

The spelling of 111978807 in words is "one hundred eleven million, nine hundred seventy-eight thousand, eight hundred seven".