2690647 has 4 divisors (see below), whose sum is σ = 2832280. Its totient is φ = 2549016.

The previous prime is 2690629. The next prime is 2690657. The reversal of 2690647 is 7460962.

2690647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-2690647 is a prime.

It is an Ulam number.

It is a Duffinian number.

2690647 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2690657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70788 + ... + 70825.

It is an arithmetic number, because the mean of its divisors is an integer number (708070).

2^2690647 is an apocalyptic number.

2690647 is a deficient number, since it is larger than the sum of its proper divisors (141633).

2690647 is a wasteful number, since it uses less digits than its factorization.

2690647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141632.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 2690647 is about 1640.3191762581. The cubic root of 2690647 is about 139.0866909142.

The spelling of 2690647 in words is "two million, six hundred ninety thousand, six hundred forty-seven".