2163957 has 4 divisors (see below), whose sum is σ = 2885280. Its totient is φ = 1442636.

The previous prime is 2163949. The next prime is 2163971. The reversal of 2163957 is 7593612.

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.

It is a cyclic number.

It is not a de Polignac number, because 2163957 - 2³ = 2163949 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163757) 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, 360657 + ... + 360662.

It is an arithmetic number, because the mean of its divisors is an integer number (721320).

2^2163957 is an apocalyptic number.

It is an amenable number.

2163957 is a deficient number, since it is larger than the sum of its proper divisors (721323).

2163957 is an equidigital number, since it uses as much as digits as its factorization.

2163957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721322.

The product of its digits is 11340, while the sum is 33.

The square root of 2163957 is about 1471.0394284315. The cubic root of 2163957 is about 129.3449693420.

The spelling of 2163957 in words is "two million, one hundred sixty-three thousand, nine hundred fifty-seven".