2187693 has 6 divisors (see below), whose sum is σ = 3160014. Its totient is φ = 1458456.

The previous prime is 2187683. The next prime is 2187697. The reversal of 2187693 is 3967812.

It can be written as a sum of positive squares in only one way, i.e., 1954404 + 233289 = 1398^2 + 483^2 .

It is not a de Polignac number, because 2187693 - 2⁶ = 2187629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187697) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121530 + ... + 121547.

It is an arithmetic number, because the mean of its divisors is an integer number (526669).

2^2187693 is an apocalyptic number.

It is an amenable number.

2187693 is a deficient number, since it is larger than the sum of its proper divisors (972321).

2187693 is a wasteful number, since it uses less digits than its factorization.

2187693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243083 (or 243080 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 2187693 is about 1479.0851902443. The cubic root of 2187693 is about 129.8161701535.

The spelling of 2187693 in words is "two million, one hundred eighty-seven thousand, six hundred ninety-three".