2163706 has 4 divisors (see below), whose sum is σ = 3245562. Its totient is φ = 1081852.

The previous prime is 2163703. The next prime is 2163737. The reversal of 2163706 is 6073612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1666681 + 497025 = 1291^2 + 705^2 .

It is not an unprimeable number, because it can be changed into a prime (2163703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540925 + ... + 540928.

2^2163706 is an apocalyptic number.

2163706 is a deficient number, since it is larger than the sum of its proper divisors (1081856).

2163706 is a wasteful number, since it uses less digits than its factorization.

2163706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081855.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 2163706 is about 1470.9541121327. The cubic root of 2163706 is about 129.3399681886.

The spelling of 2163706 in words is "two million, one hundred sixty-three thousand, seven hundred six".