1687207005 has 48 divisors (see below), whose sum is σ = 3202467840. Its totient is φ = 814934400.

The previous prime is 1687207003. The next prime is 1687207057. The reversal of 1687207005 is 5007027861.

It is not a de Polignac number, because 1687207005 - 2¹ = 1687207003 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687207001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 126820 + ... + 139490.

It is an arithmetic number, because the mean of its divisors is an integer number (66718080).

Almost surely, 2^1687207005 is an apocalyptic number.

1687207005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1687207005 is a deficient number, since it is larger than the sum of its proper divisors (1515260835).

1687207005 is a wasteful number, since it uses less digits than its factorization.

1687207005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12962 (or 12959 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 1687207005 is about 41075.6254365043. The cubic root of 1687207005 is about 1190.4818811996.

The spelling of 1687207005 in words is "one billion, six hundred eighty-seven million, two hundred seven thousand, five".