2653691 has 4 divisors (see below), whose sum is σ = 2663352. Its totient is φ = 2644032.

The previous prime is 2653687. The next prime is 2653697. The reversal of 2653691 is 1963562.

It is a happy number.

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 2653691 - 2² = 2653687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2653697) 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, 4406 + ... + 4971.

It is an arithmetic number, because the mean of its divisors is an integer number (665838).

2^2653691 is an apocalyptic number.

2653691 is a deficient number, since it is larger than the sum of its proper divisors (9661).

2653691 is an equidigital number, since it uses as much as digits as its factorization.

2653691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9660.

The product of its digits is 9720, while the sum is 32.

The square root of 2653691 is about 1629.0153467663. The cubic root of 2653691 is about 138.4469684495.

The spelling of 2653691 in words is "two million, six hundred fifty-three thousand, six hundred ninety-one".