111897147 has 8 divisors (see below), whose sum is σ = 149521680. Its totient is φ = 74435360.

The previous prime is 111897131. The next prime is 111897173. The reversal of 111897147 is 741798111.

It is a happy number.

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 111897147 - 2⁴ = 111897131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111899147) 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, 39072 + ... + 41837.

It is an arithmetic number, because the mean of its divisors is an integer number (18690210).

Almost surely, 2^111897147 is an apocalyptic number.

111897147 is a deficient number, since it is larger than the sum of its proper divisors (37624533).

111897147 is an equidigital number, since it uses as much as digits as its factorization.

111897147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81373.

The product of its digits is 14112, while the sum is 39.

The square root of 111897147 is about 10578.1447806314. The cubic root of 111897147 is about 481.8808538572.

It can be divided in two parts, 11189 and 7147, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 111897147 in words is "one hundred eleven million, eight hundred ninety-seven thousand, one hundred forty-seven".