2613643 has 4 divisors (see below), whose sum is σ = 2684320. Its totient is φ = 2542968.

The previous prime is 2613613. The next prime is 2613647. The reversal of 2613643 is 3463162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2613643 is a prime.

It is a super-2 number, since 2×2613643² = 13662259462898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2613647) 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, 35283 + ... + 35356.

It is an arithmetic number, because the mean of its divisors is an integer number (671080).

2^2613643 is an apocalyptic number.

2613643 is a deficient number, since it is larger than the sum of its proper divisors (70677).

2613643 is an equidigital number, since it uses as much as digits as its factorization.

2613643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70676.

The product of its digits is 2592, while the sum is 25.

The square root of 2613643 is about 1616.6765291795. The cubic root of 2613643 is about 137.7469808946.

The spelling of 2613643 in words is "two million, six hundred thirteen thousand, six hundred forty-three".