111291897 has 8 divisors (see below), whose sum is σ = 148651360. Its totient is φ = 74063520.

The previous prime is 111291863. The next prime is 111291899. The reversal of 111291897 is 798192111.

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

It is not a de Polignac number, because 111291897 - 2¹⁰ = 111290873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111291899) 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, 30772 + ... + 34197.

It is an arithmetic number, because the mean of its divisors is an integer number (18581420).

Almost surely, 2^111291897 is an apocalyptic number.

It is an amenable number.

111291897 is a deficient number, since it is larger than the sum of its proper divisors (37359463).

111291897 is an equidigital number, since it uses as much as digits as its factorization.

111291897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65543.

The product of its digits is 9072, while the sum is 39.

The square root of 111291897 is about 10549.4974761834. The cubic root of 111291897 is about 481.0104538539.

The spelling of 111291897 in words is "one hundred eleven million, two hundred ninety-one thousand, eight hundred ninety-seven".