432431309 has 4 divisors (see below), whose sum is σ = 433738080. Its totient is φ = 431124540.

The previous prime is 432431291. The next prime is 432431327. The reversal of 432431309 is 903134234.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (432431291) and next prime (432431327).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-432431309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (432431009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652889 + ... + 653550.

It is an arithmetic number, because the mean of its divisors is an integer number (108434520).

Almost surely, 2^432431309 is an apocalyptic number.

It is an amenable number.

432431309 is a deficient number, since it is larger than the sum of its proper divisors (1306771).

432431309 is a wasteful number, since it uses less digits than its factorization.

432431309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306770.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 432431309 is about 20794.9827843160. The cubic root of 432431309 is about 756.2041274090.

The spelling of 432431309 in words is "four hundred thirty-two million, four hundred thirty-one thousand, three hundred nine".