1111997 has 4 divisors (see below), whose sum is σ = 1115196. Its totient is φ = 1108800.

The previous prime is 1111991. The next prime is 1112003. The reversal of 1111997 is 7991111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7991111 = 541 ⋅14771.

It is an interprime number because it is at equal distance from previous prime (1111991) and next prime (1112003).

It can be written as a sum of positive squares in 2 ways, for example, as 657721 + 454276 = 811^2 + 674^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111997 - 2⁶ = 1111933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004 + ... + 1797.

It is an arithmetic number, because the mean of its divisors is an integer number (278799).

2^1111997 is an apocalyptic number.

It is an amenable number.

1111997 is a deficient number, since it is larger than the sum of its proper divisors (3199).

1111997 is an equidigital number, since it uses as much as digits as its factorization.

1111997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198.

The product of its digits is 567, while the sum is 29.

The square root of 1111997 is about 1054.5126836601. The cubic root of 1111997 is about 103.6019361802.

The spelling of 1111997 in words is "one million, one hundred eleven thousand, nine hundred ninety-seven".