1685106907 has 4 divisors (see below), whose sum is σ = 1838298456. Its totient is φ = 1531915360.

The previous prime is 1685106887. The next prime is 1685106953. The reversal of 1685106907 is 7096015861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1685106907 - 2⁷ = 1685106779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1685106607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76595758 + ... + 76595779.

It is an arithmetic number, because the mean of its divisors is an integer number (459574614).

Almost surely, 2^1685106907 is an apocalyptic number.

1685106907 is a deficient number, since it is larger than the sum of its proper divisors (153191549).

1685106907 is a wasteful number, since it uses less digits than its factorization.

1685106907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153191548.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 1685106907 is about 41050.0536784058. The cubic root of 1685106907 is about 1189.9877377923.

The spelling of 1685106907 in words is "one billion, six hundred eighty-five million, one hundred six thousand, nine hundred seven".