111977823 has 8 divisors (see below), whose sum is σ = 155795328. Its totient is φ = 71406104.

The previous prime is 111977819. The next prime is 111977843. The reversal of 111977823 is 328779111.

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 111977823 - 2² = 111977819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111977843) 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, 811365 + ... + 811502.

It is an arithmetic number, because the mean of its divisors is an integer number (19474416).

Almost surely, 2^111977823 is an apocalyptic number.

111977823 is a deficient number, since it is larger than the sum of its proper divisors (43817505).

111977823 is a wasteful number, since it uses less digits than its factorization.

111977823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622893.

The product of its digits is 21168, while the sum is 39.

The square root of 111977823 is about 10581.9574276218. The cubic root of 111977823 is about 481.9966354224.

The spelling of 111977823 in words is "one hundred eleven million, nine hundred seventy-seven thousand, eight hundred twenty-three".