2690687 has 4 divisors (see below), whose sum is σ = 2728656. Its totient is φ = 2652720.

The previous prime is 2690671. The next prime is 2690689. The reversal of 2690687 is 7860962.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7860962 = 2 ⋅3930481.

It is a cyclic number.

It is not a de Polignac number, because 2690687 - 2⁴ = 2690671 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 2690687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2690689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18878 + ... + 19019.

It is an arithmetic number, because the mean of its divisors is an integer number (682164).

2^2690687 is an apocalyptic number.

2690687 is a deficient number, since it is larger than the sum of its proper divisors (37969).

2690687 is an equidigital number, since it uses as much as digits as its factorization.

2690687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37968.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 2690687 is about 1640.3313689618. The cubic root of 2690687 is about 139.0873801462.

The spelling of 2690687 in words is "two million, six hundred ninety thousand, six hundred eighty-seven".