1685053867 has 4 divisors (see below), whose sum is σ = 1925775856. Its totient is φ = 1444331880.

The previous prime is 1685053859. The next prime is 1685053891. The reversal of 1685053867 is 7683505861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7683505861 = 17 ⋅451970933.

It is a cyclic number.

It is not a de Polignac number, because 1685053867 - 2³ = 1685053859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1685053867.

It is not an unprimeable number, because it can be changed into a prime (1685053897) 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, 120360984 + ... + 120360997.

It is an arithmetic number, because the mean of its divisors is an integer number (481443964).

Almost surely, 2^1685053867 is an apocalyptic number.

1685053867 is a deficient number, since it is larger than the sum of its proper divisors (240721989).

1685053867 is an equidigital number, since it uses as much as digits as its factorization.

1685053867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240721988.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 1685053867 is about 41049.4076327540. The cubic root of 1685053867 is about 1189.9752524100.

The spelling of 1685053867 in words is "one billion, six hundred eighty-five million, fifty-three thousand, eight hundred sixty-seven".