1685106953 has 2 divisors, whose sum is σ = 1685106954. Its totient is φ = 1685106952.

The previous prime is 1685106887. The next prime is 1685107009. The reversal of 1685106953 is 3596015861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1677967369 + 7139584 = 40963^2 + 2672^2 .

It is a cyclic number.

It is not a de Polignac number, because 1685106953 - 2¹⁴ = 1685090569 is a prime.

It is not a weakly prime, because it can be changed into another prime (1685106853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842553476 + 842553477.

It is an arithmetic number, because the mean of its divisors is an integer number (842553477).

Almost surely, 2^1685106953 is an apocalyptic number.

It is an amenable number.

1685106953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685106953 is an equidigital number, since it uses as much as digits as its factorization.

1685106953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 1685106953 is about 41050.0542386974. The cubic root of 1685106953 is about 1189.9877486204.

The spelling of 1685106953 in words is "one billion, six hundred eighty-five million, one hundred six thousand, nine hundred fifty-three".