2631009 has 4 divisors (see below), whose sum is σ = 3508016. Its totient is φ = 1754004.

The previous prime is 2631007. The next prime is 2631019. The reversal of 2631009 is 9001362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2631009 - 2¹ = 2631007 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2631007) 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, 438499 + ... + 438504.

It is an arithmetic number, because the mean of its divisors is an integer number (877004).

2^2631009 is an apocalyptic number.

It is an amenable number.

2631009 is a deficient number, since it is larger than the sum of its proper divisors (877007).

2631009 is an equidigital number, since it uses as much as digits as its factorization.

2631009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877006.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 2631009 is about 1622.0385322180. The cubic root of 2631009 is about 138.0513881292.

The spelling of 2631009 in words is "two million, six hundred thirty-one thousand, nine".