1696889691 has 12 divisors (see below), whose sum is σ = 2801214832. Its totient is φ = 969651216.

The previous prime is 1696889681. The next prime is 1696889717. The reversal of 1696889691 is 1969886961.

It is not a de Polignac number, because 1696889691 - 2⁶ = 1696889627 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 26934757 = 1696889691 / (1 + 6 + 9 + 6 + 8 + 8 + 9 + 6 + 9 + 1).

1696889691 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1696889681) 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 11 ways as a sum of consecutive naturals, for example, 13467316 + ... + 13467441.

Almost surely, 2^1696889691 is an apocalyptic number.

1696889691 is a deficient number, since it is larger than the sum of its proper divisors (1104325141).

1696889691 is a wasteful number, since it uses less digits than its factorization.

1696889691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26934770 (or 26934767 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The square root of 1696889691 is about 41193.3209513387. The cubic root of 1696889691 is about 1192.7548845359.

The spelling of 1696889691 in words is "one billion, six hundred ninety-six million, eight hundred eighty-nine thousand, six hundred ninety-one".