431509869 has 24 divisors (see below), whose sum is σ = 731082560. Its totient is φ = 246413880.

The previous prime is 431509853. The next prime is 431509901. The reversal of 431509869 is 968905134.

It is a happy number.

It is not a de Polignac number, because 431509869 - 2⁴ = 431509853 is a prime.

It is a super-2 number, since 2×431509869² = 372401534088794322, 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 (431509829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284824 + ... + 286334.

Almost surely, 2^431509869 is an apocalyptic number.

It is an amenable number.

431509869 is a deficient number, since it is larger than the sum of its proper divisors (299572691).

431509869 is an frugal number, since it uses more digits than its factorization.

431509869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3038 (or 1521 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 431509869 is about 20772.8156252348. The cubic root of 431509869 is about 755.6666299128. Note that the first 4 decimals are identical.

The spelling of 431509869 in words is "four hundred thirty-one million, five hundred nine thousand, eight hundred sixty-nine".