430243989 has 16 divisors (see below), whose sum is σ = 666723840. Its totient is φ = 241686000.

The previous prime is 430243987. The next prime is 430243993. The reversal of 430243989 is 989342034.

It is a happy number.

It is not a de Polignac number, because 430243989 - 2¹ = 430243987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 430243989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (430243987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172387 + ... + 174864.

It is an arithmetic number, because the mean of its divisors is an integer number (41670240).

Almost surely, 2^430243989 is an apocalyptic number.

It is an amenable number.

430243989 is a deficient number, since it is larger than the sum of its proper divisors (236479851).

430243989 is a wasteful number, since it uses less digits than its factorization.

430243989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347320.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 430243989 is about 20742.3236162200. The cubic root of 430243989 is about 754.9269633894.

The spelling of 430243989 in words is "four hundred thirty million, two hundred forty-three thousand, nine hundred eighty-nine".