1685359373 has 2 divisors, whose sum is σ = 1685359374. Its totient is φ = 1685359372.

The previous prime is 1685359363. The next prime is 1685359387. The reversal of 1685359373 is 3739535861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1319287684 + 366071689 = 36322^2 + 19133^2 .

It is an emirp because it is prime and its reverse (3739535861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1685359373 - 2²² = 1681165069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1685359303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842679686 + 842679687.

It is an arithmetic number, because the mean of its divisors is an integer number (842679687).

Almost surely, 2^1685359373 is an apocalyptic number.

It is an amenable number.

1685359373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685359373 is an equidigital number, since it uses as much as digits as its factorization.

1685359373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 50.

The square root of 1685359373 is about 41053.1286627463. The cubic root of 1685359373 is about 1190.0471635851.

The spelling of 1685359373 in words is "one billion, six hundred eighty-five million, three hundred fifty-nine thousand, three hundred seventy-three".