1685379827 has 2 divisors, whose sum is σ = 1685379828. Its totient is φ = 1685379826.

The previous prime is 1685379793. The next prime is 1685379889. The reversal of 1685379827 is 7289735861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1685379827 - 2¹⁸ = 1685117683 is a prime.

It is a super-2 number, since 2×1685379827² = 5681010322517099858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1685579827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842689913 + 842689914.

It is an arithmetic number, because the mean of its divisors is an integer number (842689914).

Almost surely, 2^1685379827 is an apocalyptic number.

1685379827 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685379827 is an equidigital number, since it uses as much as digits as its factorization.

1685379827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 56.

The square root of 1685379827 is about 41053.3777782048. The cubic root of 1685379827 is about 1190.0519778158.

The spelling of 1685379827 in words is "one billion, six hundred eighty-five million, three hundred seventy-nine thousand, eight hundred twenty-seven".