1431666687 has 32 divisors (see below), whose sum is σ = 2128985856. Its totient is φ = 848390400.

The previous prime is 1431666673. The next prime is 1431666697. The reversal of 1431666687 is 7866661341.

It is not a de Polignac number, because 1431666687 - 2⁶ = 1431666623 is a prime.

It is a super-3 number, since 3×1431666687³ (a number of 28 digits) contains 333 as substring.

It is a plaindrome in base 4 and base 16.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431666637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 577683 + ... + 580155.

It is an arithmetic number, because the mean of its divisors is an integer number (66530808).

Almost surely, 2^1431666687 is an apocalyptic number.

1431666687 is a deficient number, since it is larger than the sum of its proper divisors (697319169).

1431666687 is a wasteful number, since it uses less digits than its factorization.

1431666687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871.

The product of its digits is 870912, while the sum is 48.

The square root of 1431666687 is about 37837.3715656889. The cubic root of 1431666687 is about 1127.0607002760.

It can be divided in two parts, 14316 and 66687, that added together give a triangular number (81003 = T₄₀₂).

The spelling of 1431666687 in words is "one billion, four hundred thirty-one million, six hundred sixty-six thousand, six hundred eighty-seven".