111928491 has 12 divisors (see below), whose sum is σ = 163890168. Its totient is φ = 73596384.

The previous prime is 111928489. The next prime is 111928501. The reversal of 111928491 is 194829111.

It is not a de Polignac number, because 111928491 - 2¹ = 111928489 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (111928451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84525 + ... + 85838.

It is an arithmetic number, because the mean of its divisors is an integer number (13657514).

Almost surely, 2^111928491 is an apocalyptic number.

111928491 is a deficient number, since it is larger than the sum of its proper divisors (51961677).

111928491 is a wasteful number, since it uses less digits than its factorization.

111928491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170442 (or 170439 counting only the distinct ones).

The product of its digits is 5184, while the sum is 36.

The square root of 111928491 is about 10579.6262221309. The cubic root of 111928491 is about 481.9258435756.

It can be divided in two parts, 11192 and 8491, that added together give a 9-th power (19683 = 3⁹).

The spelling of 111928491 in words is "one hundred eleven million, nine hundred twenty-eight thousand, four hundred ninety-one".