2138767 has 4 divisors (see below), whose sum is σ = 2165920. Its totient is φ = 2111616.

The previous prime is 2138749. The next prime is 2138789. The reversal of 2138767 is 7678312.

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

It is a cyclic number.

It is not a de Polignac number, because 2138767 - 2¹⁹ = 1614479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138737) 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, 13458 + ... + 13615.

It is an arithmetic number, because the mean of its divisors is an integer number (541480).

2^2138767 is an apocalyptic number.

2138767 is a deficient number, since it is larger than the sum of its proper divisors (27153).

2138767 is an equidigital number, since it uses as much as digits as its factorization.

2138767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27152.

The product of its digits is 14112, while the sum is 34.

The square root of 2138767 is about 1462.4523923875. The cubic root of 2138767 is about 128.8411200254.

The spelling of 2138767 in words is "two million, one hundred thirty-eight thousand, seven hundred sixty-seven".