1696381 has 4 divisors (see below), whose sum is σ = 1701052. Its totient is φ = 1691712.

The previous prime is 1696369. The next prime is 1696391. The reversal of 1696381 is 1836961.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 793881 + 902500 = 891^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 1696381 - 2¹³ = 1688189 is a prime.

It is a super-2 number, since 2×1696381² = 5755416994322, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1696391) 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, 1740 + ... + 2533.

It is an arithmetic number, because the mean of its divisors is an integer number (425263).

2^1696381 is an apocalyptic number.

It is an amenable number.

1696381 is a deficient number, since it is larger than the sum of its proper divisors (4671).

1696381 is an equidigital number, since it uses as much as digits as its factorization.

1696381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4670.

The product of its digits is 7776, while the sum is 34.

The square root of 1696381 is about 1302.4519184983. The cubic root of 1696381 is about 119.2635685211.

The spelling of 1696381 in words is "one million, six hundred ninety-six thousand, three hundred eighty-one".