2311997 has 4 divisors (see below), whose sum is σ = 2315040. Its totient is φ = 2308956.

The previous prime is 2311993. The next prime is 2312021. The reversal of 2311997 is 7991132.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2311997 - 2² = 2311993 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 (2311993) 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, 704 + ... + 2262.

It is an arithmetic number, because the mean of its divisors is an integer number (578760).

2^2311997 is an apocalyptic number.

It is an amenable number.

2311997 is a deficient number, since it is larger than the sum of its proper divisors (3043).

2311997 is a wasteful number, since it uses less digits than its factorization.

2311997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3042.

The product of its digits is 3402, while the sum is 32.

The square root of 2311997 is about 1520.5252381990. The cubic root of 2311997 is about 132.2297231763.

The spelling of 2311997 in words is "two million, three hundred eleven thousand, nine hundred ninety-seven".