1685112279 has 4 divisors (see below), whose sum is σ = 2246816376. Its totient is φ = 1123408184.

The previous prime is 1685112271. The next prime is 1685112283. The reversal of 1685112279 is 9722115861.

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 1685112279 - 2³ = 1685112271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1685112279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685112271) 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, 280852044 + ... + 280852049.

It is an arithmetic number, because the mean of its divisors is an integer number (561704094).

Almost surely, 2^1685112279 is an apocalyptic number.

1685112279 is a deficient number, since it is larger than the sum of its proper divisors (561704097).

1685112279 is an equidigital number, since it uses as much as digits as its factorization.

1685112279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561704096.

The product of its digits is 60480, while the sum is 42.

The square root of 1685112279 is about 41050.1191106676. The cubic root of 1685112279 is about 1189.9890023229.

The spelling of 1685112279 in words is "one billion, six hundred eighty-five million, one hundred twelve thousand, two hundred seventy-nine".