111992621 has 8 divisors (see below), whose sum is σ = 121779840. Its totient is φ = 102372912.

The previous prime is 111992609. The next prime is 111992627. The reversal of 111992621 is 126299111.

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 111992621 - 2⁶ = 111992557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111992627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40481 + ... + 43158.

It is an arithmetic number, because the mean of its divisors is an integer number (15222480).

Almost surely, 2^111992621 is an apocalyptic number.

It is an amenable number.

111992621 is a deficient number, since it is larger than the sum of its proper divisors (9787219).

111992621 is a wasteful number, since it uses less digits than its factorization.

111992621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83755.

The product of its digits is 1944, while the sum is 32.

The square root of 111992621 is about 10582.6566135352. The cubic root of 111992621 is about 482.0178666265.

The spelling of 111992621 in words is "one hundred eleven million, nine hundred ninety-two thousand, six hundred twenty-one".