1694216969 has 4 divisors (see below), whose sum is σ = 1698640896. Its totient is φ = 1689793044.

The previous prime is 1694216963. The next prime is 1694216971. The reversal of 1694216969 is 9696124961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1694216969 - 2¹² = 1694212873 is a prime.

It is a super-2 number, since 2×1694216969² = 5740742276095093922, which contains 22 as substring.

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 1694216969.

It is not an unprimeable number, because it can be changed into a prime (1694216963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2211389 + ... + 2212154.

It is an arithmetic number, because the mean of its divisors is an integer number (424660224).

Almost surely, 2^1694216969 is an apocalyptic number.

It is an amenable number.

1694216969 is a deficient number, since it is larger than the sum of its proper divisors (4423927).

1694216969 is an equidigital number, since it uses as much as digits as its factorization.

1694216969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4423926.

The product of its digits is 1259712, while the sum is 53.

The square root of 1694216969 is about 41160.8669612291. The cubic root of 1694216969 is about 1192.1283308619.

The spelling of 1694216969 in words is "one billion, six hundred ninety-four million, two hundred sixteen thousand, nine hundred sixty-nine".