431989133 has 16 divisors (see below), whose sum is σ = 456046080. Its totient is φ = 408614976.

The previous prime is 431989049. The next prime is 431989139. The reversal of 431989133 is 331989134.

It is a cyclic number.

It is not a de Polignac number, because 431989133 - 2²⁰ = 430940557 is a prime.

It is a super-2 number, since 2×431989133² = 373229222060183378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431989139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432791 + ... + 433787.

It is an arithmetic number, because the mean of its divisors is an integer number (28502880).

Almost surely, 2^431989133 is an apocalyptic number.

It is an amenable number.

431989133 is a deficient number, since it is larger than the sum of its proper divisors (24056947).

431989133 is a wasteful number, since it uses less digits than its factorization.

431989133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316.

The product of its digits is 69984, while the sum is 41.

The square root of 431989133 is about 20784.3482697919. The cubic root of 431989133 is about 755.9462911976.

Subtracting from 431989133 its reverse (331989134), we obtain a palindrome (99999999).

The spelling of 431989133 in words is "four hundred thirty-one million, nine hundred eighty-nine thousand, one hundred thirty-three".