2172663 has 12 divisors (see below), whose sum is σ = 3254888. Its totient is φ = 1448280.

The previous prime is 2172659. The next prime is 2172673. The reversal of 2172663 is 3662712.

It is a happy number.

It is not a de Polignac number, because 2172663 - 2² = 2172659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

2172663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4228 + ... + 4713.

2^2172663 is an apocalyptic number.

2172663 is a deficient number, since it is larger than the sum of its proper divisors (1082225).

2172663 is an frugal number, since it uses more digits than its factorization.

2172663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8956 (or 8944 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 2172663 is about 1473.9955902241. The cubic root of 2172663 is about 129.5181968337.

The spelling of 2172663 in words is "two million, one hundred seventy-two thousand, six hundred sixty-three".