1683394 has 4 divisors (see below), whose sum is σ = 2525094. Its totient is φ = 841696.

The previous prime is 1683373. The next prime is 1683397. The reversal of 1683394 is 4933861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4933861 = 71 ⋅69491.

It can be written as a sum of positive squares in only one way, i.e., 1292769 + 390625 = 1137^2 + 625^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1683397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420847 + ... + 420850.

2^1683394 is an apocalyptic number.

1683394 is a deficient number, since it is larger than the sum of its proper divisors (841700).

1683394 is an equidigital number, since it uses as much as digits as its factorization.

1683394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841699.

The product of its digits is 15552, while the sum is 34.

The square root of 1683394 is about 1297.4567430169. The cubic root of 1683394 is about 118.9584394566.

The spelling of 1683394 in words is "one million, six hundred eighty-three thousand, three hundred ninety-four".