2608391 has 4 divisors (see below), whose sum is σ = 2622984. Its totient is φ = 2593800.

The previous prime is 2608387. The next prime is 2608393. The reversal of 2608391 is 1938062.

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 2608391 - 2² = 2608387 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 (2608393) 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, 7025 + ... + 7386.

It is an arithmetic number, because the mean of its divisors is an integer number (655746).

2^2608391 is an apocalyptic number.

2608391 is a deficient number, since it is larger than the sum of its proper divisors (14593).

2608391 is a wasteful number, since it uses less digits than its factorization.

2608391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14592.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2608391 is about 1615.0513923712. The cubic root of 2608391 is about 137.6546535360.

The spelling of 2608391 in words is "two million, six hundred eight thousand, three hundred ninety-one".