2138317 has 4 divisors (see below), whose sum is σ = 2250880. Its totient is φ = 2025756.

The previous prime is 2138291. The next prime is 2138321. The reversal of 2138317 is 7138312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2138317 - 2⁷ = 2138189 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2138291 and 2138300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138327) 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, 56253 + ... + 56290.

It is an arithmetic number, because the mean of its divisors is an integer number (562720).

2^2138317 is an apocalyptic number.

It is an amenable number.

2138317 is a deficient number, since it is larger than the sum of its proper divisors (112563).

2138317 is a wasteful number, since it uses less digits than its factorization.

2138317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112562.

The product of its digits is 1008, while the sum is 25.

The square root of 2138317 is about 1462.2985331320. The cubic root of 2138317 is about 128.8320832657.

The spelling of 2138317 in words is "two million, one hundred thirty-eight thousand, three hundred seventeen".