2620691 has 8 divisors (see below), whose sum is σ = 2694384. Its totient is φ = 2548000.

The previous prime is 2620663. The next prime is 2620741. The reversal of 2620691 is 1960262.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2620691 - 2¹⁰ = 2619667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2620691.

It is not an unprimeable number, because it can be changed into a prime (2620661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10316 + ... + 10566.

It is an arithmetic number, because the mean of its divisors is an integer number (336798).

2^2620691 is an apocalyptic number.

2620691 is a deficient number, since it is larger than the sum of its proper divisors (73693).

2620691 is a wasteful number, since it uses less digits than its factorization.

2620691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2620691 is about 1618.8548421647. The cubic root of 2620691 is about 137.8706868182.

The spelling of 2620691 in words is "two million, six hundred twenty thousand, six hundred ninety-one".