2670391 has 4 divisors (see below), whose sum is σ = 2695000. Its totient is φ = 2645784.

The previous prime is 2670373. The next prime is 2670439. The reversal of 2670391 is 1930762.

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 2670391 - 2¹¹ = 2668343 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 (2670301) 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, 12141 + ... + 12358.

It is an arithmetic number, because the mean of its divisors is an integer number (673750).

2^2670391 is an apocalyptic number.

2670391 is a deficient number, since it is larger than the sum of its proper divisors (24609).

2670391 is a wasteful number, since it uses less digits than its factorization.

2670391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24608.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 2670391 is about 1634.1331035139. The cubic root of 2670391 is about 138.7367825518.

The spelling of 2670391 in words is "two million, six hundred seventy thousand, three hundred ninety-one".