3686971 has 2 divisors, whose sum is σ = 3686972. Its totient is φ = 3686970.

The previous prime is 3686957. The next prime is 3686983. The reversal of 3686971 is 1796863.

It is a strong prime.

It is an emirp because it is prime and its reverse (1796863) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3686971 is a prime.

It is a pancake number, because a pancake can be divided into 3686971 parts by 2715 straight cuts.

3686971 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3686941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1843485 + 1843486.

It is an arithmetic number, because the mean of its divisors is an integer number (1843486).

Almost surely, 2^3686971 is an apocalyptic number.

3686971 is a deficient number, since it is larger than the sum of its proper divisors (1).

3686971 is an equidigital number, since it uses as much as digits as its factorization.

3686971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 3686971 is about 1920.1486921590. The cubic root of 3686971 is about 154.4862770285.

The spelling of 3686971 in words is "three million, six hundred eighty-six thousand, nine hundred seventy-one".