1687682972 has 6 divisors (see below), whose sum is σ = 2953445208. Its totient is φ = 843841484.

The previous prime is 1687682917. The next prime is 1687682987. The reversal of 1687682972 is 2792867861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210960368 + ... + 210960375.

It is an arithmetic number, because the mean of its divisors is an integer number (492240868).

Almost surely, 2^1687682972 is an apocalyptic number.

It is an amenable number.

1687682972 is a deficient number, since it is larger than the sum of its proper divisors (1265762236).

1687682972 is a wasteful number, since it uses less digits than its factorization.

1687682972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421920747 (or 421920745 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 56.

The square root of 1687682972 is about 41081.4188167838. The cubic root of 1687682972 is about 1190.5938170426.

The spelling of 1687682972 in words is "one billion, six hundred eighty-seven million, six hundred eighty-two thousand, nine hundred seventy-two".