1688374 has 4 divisors (see below), whose sum is σ = 2532564. Its totient is φ = 844186.

The previous prime is 1688371. The next prime is 1688387. The reversal of 1688374 is 4738861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4738861 = 29 ⋅163409.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422092 + ... + 422095.

It is an arithmetic number, because the mean of its divisors is an integer number (633141).

2^1688374 is an apocalyptic number.

1688374 is a deficient number, since it is larger than the sum of its proper divisors (844190).

1688374 is an equidigital number, since it uses as much as digits as its factorization.

1688374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844189.

The product of its digits is 32256, while the sum is 37.

The square root of 1688374 is about 1299.3744648869. The cubic root of 1688374 is about 119.0756292542.

The spelling of 1688374 in words is "one million, six hundred eighty-eight thousand, three hundred seventy-four".