1691696 has 20 divisors (see below), whose sum is σ = 3420912. Its totient is φ = 808896.

The previous prime is 1691693. The next prime is 1691737. The reversal of 1691696 is 6961961.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1691693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1931 + ... + 2666.

2^1691696 is an apocalyptic number.

1691696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1691696 is an abundant number, since it is smaller than the sum of its proper divisors (1729216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1691696 is a wasteful number, since it uses less digits than its factorization.

1691696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628 (or 4622 counting only the distinct ones).

The product of its digits is 17496, while the sum is 38.

The square root of 1691696 is about 1300.6521441185. The cubic root of 1691696 is about 119.1536747754.

The spelling of 1691696 in words is "one million, six hundred ninety-one thousand, six hundred ninety-six".