2631409 has 8 divisors (see below), whose sum is σ = 2892960. Its totient is φ = 2373600.

The previous prime is 2631401. The next prime is 2631427. The reversal of 2631409 is 9041362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2631409 - 2³ = 2631401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2631401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 669 + ... + 2389.

It is an arithmetic number, because the mean of its divisors is an integer number (361620).

2^2631409 is an apocalyptic number.

It is an amenable number.

2631409 is a deficient number, since it is larger than the sum of its proper divisors (261551).

2631409 is a wasteful number, since it uses less digits than its factorization.

2631409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 2631409 is about 1622.1618291650. The cubic root of 2631409 is about 138.0583838936.

The spelling of 2631409 in words is "two million, six hundred thirty-one thousand, four hundred nine".