2172937 has 4 divisors (see below), whose sum is σ = 2340100. Its totient is φ = 2005776.

The previous prime is 2172917. The next prime is 2172943. The reversal of 2172937 is 7392712.

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

It can be written as a sum of positive squares in 2 ways, for example, as 145161 + 2027776 = 381^2 + 1424^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172937 - 2¹⁵ = 2140169 is a prime.

It is a Duffinian number.

2172937 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2172899 and 2172908.

It is not an unprimeable number, because it can be changed into a prime (2172917) 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, 83562 + ... + 83587.

It is an arithmetic number, because the mean of its divisors is an integer number (585025).

2^2172937 is an apocalyptic number.

It is an amenable number.

2172937 is a deficient number, since it is larger than the sum of its proper divisors (167163).

2172937 is a wasteful number, since it uses less digits than its factorization.

2172937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167162.

The product of its digits is 5292, while the sum is 31.

The square root of 2172937 is about 1474.0885319410. The cubic root of 2172937 is about 129.5236412268.

The spelling of 2172937 in words is "two million, one hundred seventy-two thousand, nine hundred thirty-seven".