3681394 has 4 divisors (see below), whose sum is σ = 5522094. Its totient is φ = 1840696.

The previous prime is 3681373. The next prime is 3681407. The reversal of 3681394 is 4931863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4931863 = 137 ⋅35999.

It can be written as a sum of positive squares in only one way, i.e., 3017169 + 664225 = 1737^2 + 815^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920347 + ... + 920350.

Almost surely, 2^3681394 is an apocalyptic number.

3681394 is a deficient number, since it is larger than the sum of its proper divisors (1840700).

3681394 is a wasteful number, since it uses less digits than its factorization.

3681394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840699.

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

The square root of 3681394 is about 1918.6959112897. The cubic root of 3681394 is about 154.4083445158.

The spelling of 3681394 in words is "three million, six hundred eighty-one thousand, three hundred ninety-four".