424232509 has 2 divisors, whose sum is σ = 424232510. Its totient is φ = 424232508.

The previous prime is 424232483. The next prime is 424232527. The reversal of 424232509 is 905232424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 421152484 + 3080025 = 20522^2 + 1755^2 .

It is a cyclic number.

It is not a de Polignac number, because 424232509 - 2⁵ = 424232477 is a prime.

It is equal to p_22557730 and since 424232509 and 22557730 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424232579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212116254 + 212116255.

It is an arithmetic number, because the mean of its divisors is an integer number (212116255).

Almost surely, 2^424232509 is an apocalyptic number.

It is an amenable number.

424232509 is a deficient number, since it is larger than the sum of its proper divisors (1).

424232509 is an equidigital number, since it uses as much as digits as its factorization.

424232509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 424232509 is about 20596.9053258008. The cubic root of 424232509 is about 751.3944481162.

The spelling of 424232509 in words is "four hundred twenty-four million, two hundred thirty-two thousand, five hundred nine".