1431684643 has 4 divisors (see below), whose sum is σ = 1432118808. Its totient is φ = 1431250480.

The previous prime is 1431684629. The next prime is 1431684659. The reversal of 1431684643 is 3464861341.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1431684643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1431684596 and 1431684605.

It is not an unprimeable number, because it can be changed into a prime (1431685643) 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, 212098 + ... + 218743.

It is an arithmetic number, because the mean of its divisors is an integer number (358029702).

Almost surely, 2^1431684643 is an apocalyptic number.

1431684643 is a deficient number, since it is larger than the sum of its proper divisors (434165).

1431684643 is an equidigital number, since it uses as much as digits as its factorization.

1431684643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434164.

The product of its digits is 165888, while the sum is 40.

The square root of 1431684643 is about 37837.6088435831. The cubic root of 1431684643 is about 1127.0654121309.

The spelling of 1431684643 in words is "one billion, four hundred thirty-one million, six hundred eighty-four thousand, six hundred forty-three".