1687984507 has 8 divisors (see below), whose sum is σ = 1841842800. Its totient is φ = 1534193760.

The previous prime is 1687984483. The next prime is 1687984531. The reversal of 1687984507 is 7054897861.

It is an interprime number because it is at equal distance from previous prime (1687984483) and next prime (1687984531).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1687984507 - 2¹⁹ = 1687460219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1687981507) 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 7 ways as a sum of consecutive naturals, for example, 45369 + ... + 73717.

It is an arithmetic number, because the mean of its divisors is an integer number (230230350).

Almost surely, 2^1687984507 is an apocalyptic number.

1687984507 is a deficient number, since it is larger than the sum of its proper divisors (153858293).

1687984507 is a wasteful number, since it uses less digits than its factorization.

1687984507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33773.

The product of its (nonzero) digits is 3386880, while the sum is 55.

The square root of 1687984507 is about 41085.0886210557. The cubic root of 1687984507 is about 1190.6647198392.

The spelling of 1687984507 in words is "one billion, six hundred eighty-seven million, nine hundred eighty-four thousand, five hundred seven".