2667391 has 16 divisors (see below), whose sum is σ = 2995200. Its totient is φ = 2364768.

The previous prime is 2667383. The next prime is 2667433. The reversal of 2667391 is 1937662.

It is a cyclic number.

It is not a de Polignac number, because 2667391 - 2³ = 2667383 is a prime.

It is a super-2 number, since 2×2667391² = 14229949493762, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

2667391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2667311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25846 + ... + 25948.

It is an arithmetic number, because the mean of its divisors is an integer number (187200).

2^2667391 is an apocalyptic number.

2667391 is a deficient number, since it is larger than the sum of its proper divisors (327809).

2667391 is a wasteful number, since it uses less digits than its factorization.

2667391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198.

The product of its digits is 13608, while the sum is 34.

The square root of 2667391 is about 1633.2149276810. The cubic root of 2667391 is about 138.6848093506.

The spelling of 2667391 in words is "two million, six hundred sixty-seven thousand, three hundred ninety-one".