2690869 has 4 divisors (see below), whose sum is σ = 2714796. Its totient is φ = 2666944.

The previous prime is 2690851. The next prime is 2690887. The reversal of 2690869 is 9680962.

It is a happy number.

2690869 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, and also an emirpimes, since its reverse is a distinct semiprime: 9680962 = 2 ⋅4840481.

It is an interprime number because it is at equal distance from previous prime (2690851) and next prime (2690887).

It can be written as a sum of positive squares in 2 ways, for example, as 544644 + 2146225 = 738^2 + 1465^2 .

It is a cyclic number.

It is not a de Polignac number, because 2690869 - 2⁹ = 2690357 is a prime.

It is a super-2 number, since 2×2690869² = 14481551950322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2694869) 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, 11794 + ... + 12019.

It is an arithmetic number, because the mean of its divisors is an integer number (678699).

2^2690869 is an apocalyptic number.

It is an amenable number.

2690869 is a deficient number, since it is larger than the sum of its proper divisors (23927).

2690869 is a wasteful number, since it uses less digits than its factorization.

2690869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23926.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 2690869 is about 1640.3868446193. The cubic root of 2690869 is about 139.0905160656.

The spelling of 2690869 in words is "two million, six hundred ninety thousand, eight hundred sixty-nine".