423424409 has 2 divisors, whose sum is σ = 423424410. Its totient is φ = 423424408.

The previous prime is 423424399. The next prime is 423424433. The reversal of 423424409 is 904424324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264160009 + 159264400 = 16253^2 + 12620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423424409 is a prime.

It is not a weakly prime, because it can be changed into another prime (423424499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211712204 + 211712205.

It is an arithmetic number, because the mean of its divisors is an integer number (211712205).

Almost surely, 2^423424409 is an apocalyptic number.

It is an amenable number.

423424409 is a deficient number, since it is larger than the sum of its proper divisors (1).

423424409 is an equidigital number, since it uses as much as digits as its factorization.

423424409 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 423424409 is about 20577.2789503374. The cubic root of 423424409 is about 750.9170465401.

The spelling of 423424409 in words is "four hundred twenty-three million, four hundred twenty-four thousand, four hundred nine".