432621509 has 2 divisors, whose sum is σ = 432621510. Its totient is φ = 432621508.

The previous prime is 432621503. The next prime is 432621521. The reversal of 432621509 is 905126234.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 432016225 + 605284 = 20785^2 + 778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-432621509 is a prime.

It is a super-2 number, since 2×432621509² = 374322740098874162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (432621503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216310754 + 216310755.

It is an arithmetic number, because the mean of its divisors is an integer number (216310755).

Almost surely, 2^432621509 is an apocalyptic number.

It is an amenable number.

432621509 is a deficient number, since it is larger than the sum of its proper divisors (1).

432621509 is an equidigital number, since it uses as much as digits as its factorization.

432621509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 432621509 is about 20799.5555000582. Note that the first 4 decimals coincide. The cubic root of 432621509 is about 756.3149804238.

The spelling of 432621509 in words is "four hundred thirty-two million, six hundred twenty-one thousand, five hundred nine".