2409691 has 4 divisors (see below), whose sum is σ = 2422000. Its totient is φ = 2397384.

The previous prime is 2409689. The next prime is 2409709. The reversal of 2409691 is 1969042.

It is a happy number.

2409691 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 not a de Polignac number, because 2409691 - 2¹ = 2409689 is a prime.

It is a super-2 number, since 2×2409691² = 11613221430962, which contains 22 as substring.

It is a Duffinian number.

2409691 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2409601) 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, 5856 + ... + 6253.

It is an arithmetic number, because the mean of its divisors is an integer number (605500).

2^2409691 is an apocalyptic number.

2409691 is a deficient number, since it is larger than the sum of its proper divisors (12309).

2409691 is a wasteful number, since it uses less digits than its factorization.

2409691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12308.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2409691 is about 1552.3179442369. The cubic root of 2409691 is about 134.0665556357.

The spelling of 2409691 in words is "two million, four hundred nine thousand, six hundred ninety-one".