2799409 has 2 divisors, whose sum is σ = 2799410. Its totient is φ = 2799408.

The previous prime is 2799397. The next prime is 2799413. The reversal of 2799409 is 9049972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2093809 + 705600 = 1447^2 + 840^2 .

It is a cyclic number.

It is not a de Polignac number, because 2799409 - 2⁷ = 2799281 is a prime.

It is not a weakly prime, because it can be changed into another prime (2799449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1399704 + 1399705.

It is an arithmetic number, because the mean of its divisors is an integer number (1399705).

2^2799409 is an apocalyptic number.

It is an amenable number.

2799409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2799409 is an equidigital number, since it uses as much as digits as its factorization.

2799409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 2799409 is about 1673.1434487216. The cubic root of 2799409 is about 140.9360573874.

The spelling of 2799409 in words is "two million, seven hundred ninety-nine thousand, four hundred nine".