2872409 has 2 divisors, whose sum is σ = 2872410. Its totient is φ = 2872408.

The previous prime is 2872393. The next prime is 2872417. The reversal of 2872409 is 9042782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1882384 + 990025 = 1372^2 + 995^2 .

It is a cyclic number.

It is not a de Polignac number, because 2872409 - 2⁴ = 2872393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2872459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1436204 + 1436205.

It is an arithmetic number, because the mean of its divisors is an integer number (1436205).

2^2872409 is an apocalyptic number.

It is an amenable number.

2872409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2872409 is an equidigital number, since it uses as much as digits as its factorization.

2872409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 2872409 is about 1694.8182793444. The cubic root of 2872409 is about 142.1506204478.

The spelling of 2872409 in words is "two million, eight hundred seventy-two thousand, four hundred nine".