1685973107 has 16 divisors (see below), whose sum is σ = 2100053760. Its totient is φ = 1317879072.

The previous prime is 1685973077. The next prime is 1685973109. The reversal of 1685973107 is 7013795861.

It is a cyclic number.

It is not a de Polignac number, because 1685973107 - 2¹⁶ = 1685907571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1685973109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104057 + ... + 119162.

It is an arithmetic number, because the mean of its divisors is an integer number (131253360).

Almost surely, 2^1685973107 is an apocalyptic number.

1685973107 is a deficient number, since it is larger than the sum of its proper divisors (414080653).

1685973107 is a wasteful number, since it uses less digits than its factorization.

1685973107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223322.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 1685973107 is about 41060.6028572402. The cubic root of 1685973107 is about 1190.1916003897.

The spelling of 1685973107 in words is "one billion, six hundred eighty-five million, nine hundred seventy-three thousand, one hundred seven".