3847691 has 4 divisors (see below), whose sum is σ = 3980400. Its totient is φ = 3714984.

The previous prime is 3847687. The next prime is 3847721. The reversal of 3847691 is 1967483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1967483 = 7 ⋅281069.

It is a cyclic number.

It is not a de Polignac number, because 3847691 - 2² = 3847687 is a prime.

It is a super-3 number, since 3×3847691³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3847621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66311 + ... + 66368.

It is an arithmetic number, because the mean of its divisors is an integer number (995100).

Almost surely, 2^3847691 is an apocalyptic number.

3847691 is a deficient number, since it is larger than the sum of its proper divisors (132709).

3847691 is a wasteful number, since it uses less digits than its factorization.

3847691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132708.

The product of its digits is 36288, while the sum is 38.

The square root of 3847691 is about 1961.5532111059. The cubic root of 3847691 is about 156.6991819238.

The spelling of 3847691 in words is "three million, eight hundred forty-seven thousand, six hundred ninety-one".