2607691 has 4 divisors (see below), whose sum is σ = 2628352. Its totient is φ = 2587032.

The previous prime is 2607677. The next prime is 2607721. The reversal of 2607691 is 1967062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1967062 = 2 ⋅983531.

It is a cyclic number.

It is not a de Polignac number, because 2607691 - 2⁵ = 2607659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2607601) 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, 10140 + ... + 10393.

It is an arithmetic number, because the mean of its divisors is an integer number (657088).

2^2607691 is an apocalyptic number.

2607691 is a deficient number, since it is larger than the sum of its proper divisors (20661).

2607691 is a wasteful number, since it uses less digits than its factorization.

2607691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20660.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 2607691 is about 1614.8346664597. The cubic root of 2607691 is about 137.6423385522.

The spelling of 2607691 in words is "two million, six hundred seven thousand, six hundred ninety-one".