3894691 has 2 divisors, whose sum is σ = 3894692. Its totient is φ = 3894690.

The previous prime is 3894689. The next prime is 3894697. The reversal of 3894691 is 1964983.

It is a weak prime.

It is an emirp because it is prime and its reverse (1964983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3894691 - 2¹ = 3894689 is a prime.

Together with 3894689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3894697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1947345 + 1947346.

It is an arithmetic number, because the mean of its divisors is an integer number (1947346).

Almost surely, 2^3894691 is an apocalyptic number.

3894691 is a deficient number, since it is larger than the sum of its proper divisors (1).

3894691 is an equidigital number, since it uses as much as digits as its factorization.

3894691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 40.

The square root of 3894691 is about 1973.4971497319. The cubic root of 3894691 is about 157.3346345331.

The spelling of 3894691 in words is "three million, eight hundred ninety-four thousand, six hundred ninety-one".