1924409 has 2 divisors, whose sum is σ = 1924410. Its totient is φ = 1924408.

The previous prime is 1924397. The next prime is 1924457. The reversal of 1924409 is 9044291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1882384 + 42025 = 1372^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1924409 - 2⁴ = 1924393 is a prime.

It is a Chen prime.

It is a plaindrome in base 7.

It is a zygodrome in base 7.

It is not a weakly prime, because it can be changed into another prime (1924459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962204 + 962205.

It is an arithmetic number, because the mean of its divisors is an integer number (962205).

2^1924409 is an apocalyptic number.

It is an amenable number.

1924409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1924409 is an equidigital number, since it uses as much as digits as its factorization.

1924409 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 29.

The square root of 1924409 is about 1387.2306945854. The cubic root of 1924409 is about 124.3843649253.

The spelling of 1924409 in words is "one million, nine hundred twenty-four thousand, four hundred nine".