2909969 has 4 divisors (see below), whose sum is σ = 2916900. Its totient is φ = 2903040.

The previous prime is 2909957. The next prime is 2909971. The reversal of 2909969 is 9699092.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2362369 + 547600 = 1537^2 + 740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2909969 is a prime.

It is a super-2 number, since 2×2909969² = 16935839161922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2909909) 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, 2792 + ... + 3689.

It is an arithmetic number, because the mean of its divisors is an integer number (729225).

2^2909969 is an apocalyptic number.

It is an amenable number.

2909969 is a deficient number, since it is larger than the sum of its proper divisors (6931).

2909969 is an equidigital number, since it uses as much as digits as its factorization.

2909969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6930.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 2909969 is about 1705.8631246381. The cubic root of 2909969 is about 142.7675327067.

The spelling of 2909969 in words is "two million, nine hundred nine thousand, nine hundred sixty-nine".