2623409 has 2 divisors, whose sum is σ = 2623410. Its totient is φ = 2623408.

The previous prime is 2623391. The next prime is 2623421. The reversal of 2623409 is 9043262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2411809 + 211600 = 1553^2 + 460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2623409 is a prime.

It is not a weakly prime, because it can be changed into another prime (2623429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1311704 + 1311705.

It is an arithmetic number, because the mean of its divisors is an integer number (1311705).

2^2623409 is an apocalyptic number.

It is an amenable number.

2623409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2623409 is an equidigital number, since it uses as much as digits as its factorization.

2623409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 2623409 is about 1619.6941069227. The cubic root of 2623409 is about 137.9183336732.

The spelling of 2623409 in words is "two million, six hundred twenty-three thousand, four hundred nine".