8111997 has 6 divisors (see below), whose sum is σ = 11717342. Its totient is φ = 5407992.

The previous prime is 8111981. The next prime is 8112001. The reversal of 8111997 is 7991118.

It can be written as a sum of positive squares in only one way, i.e., 5659641 + 2452356 = 2379^2 + 1566^2 .

It is not a de Polignac number, because 8111997 - 2⁴ = 8111981 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8111947) 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 5 ways as a sum of consecutive naturals, for example, 450658 + ... + 450675.

Almost surely, 2^8111997 is an apocalyptic number.

It is an amenable number.

8111997 is a deficient number, since it is larger than the sum of its proper divisors (3605345).

8111997 is a wasteful number, since it uses less digits than its factorization.

8111997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901339 (or 901336 counting only the distinct ones).

The product of its digits is 4536, while the sum is 36.

The square root of 8111997 is about 2848.1567723705. The cubic root of 8111997 is about 200.9289865720.

The spelling of 8111997 in words is "eight million, one hundred eleven thousand, nine hundred ninety-seven".