2172999 has 8 divisors (see below), whose sum is σ = 2997360. Its totient is φ = 1398656.

The previous prime is 2172997. The next prime is 2173001. The reversal of 2172999 is 9992712.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2172997) and next prime (2173001).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2172999 - 2¹ = 2172997 is a prime.

2172999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12402 + ... + 12575.

It is an arithmetic number, because the mean of its divisors is an integer number (374670).

2^2172999 is an apocalyptic number.

2172999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2172999 is a deficient number, since it is larger than the sum of its proper divisors (824361).

2172999 is a wasteful number, since it uses less digits than its factorization.

2172999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25009.

The product of its digits is 20412, while the sum is 39.

The square root of 2172999 is about 1474.1095617355. The cubic root of 2172999 is about 129.5248731063.

The spelling of 2172999 in words is "two million, one hundred seventy-two thousand, nine hundred ninety-nine".