424423409 has 2 divisors, whose sum is σ = 424423410. Its totient is φ = 424423408.

The previous prime is 424423369. The next prime is 424423427. The reversal of 424423409 is 904324424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 361570225 + 62853184 = 19015^2 + 7928^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424423409 is a prime.

It is not a weakly prime, because it can be changed into another prime (424423469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212211704 + 212211705.

It is an arithmetic number, because the mean of its divisors is an integer number (212211705).

Almost surely, 2^424423409 is an apocalyptic number.

It is an amenable number.

424423409 is a deficient number, since it is larger than the sum of its proper divisors (1).

424423409 is an equidigital number, since it uses as much as digits as its factorization.

424423409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 424423409 is about 20601.5389959100. The cubic root of 424423409 is about 751.5071376491.

The spelling of 424423409 in words is "four hundred twenty-four million, four hundred twenty-three thousand, four hundred nine".