1696987 has 4 divisors (see below), whose sum is σ = 1699600. Its totient is φ = 1694376.

The previous prime is 1696979. The next prime is 1697027. The reversal of 1696987 is 7896961.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1696987 - 2³ = 1696979 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1693987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514 + ... + 1912.

It is an arithmetic number, because the mean of its divisors is an integer number (424900).

2^1696987 is an apocalyptic number.

1696987 is a deficient number, since it is larger than the sum of its proper divisors (2613).

1696987 is a wasteful number, since it uses less digits than its factorization.

1696987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2612.

The product of its digits is 163296, while the sum is 46.

The square root of 1696987 is about 1302.6845358720. The cubic root of 1696987 is about 119.2777683811.

The spelling of 1696987 in words is "one million, six hundred ninety-six thousand, nine hundred eighty-seven".