3657971 has 4 divisors (see below), whose sum is σ = 3661944. Its totient is φ = 3654000.

The previous prime is 3657961. The next prime is 3657977. The reversal of 3657971 is 1797563.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3657971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3657977) 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, 191 + ... + 2711.

It is an arithmetic number, because the mean of its divisors is an integer number (915486).

Almost surely, 2^3657971 is an apocalyptic number.

3657971 is a deficient number, since it is larger than the sum of its proper divisors (3973).

3657971 is a wasteful number, since it uses less digits than its factorization.

3657971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972.

The product of its digits is 39690, while the sum is 38.

The square root of 3657971 is about 1912.5822858115. The cubic root of 3657971 is about 154.0801713331.

The spelling of 3657971 in words is "three million, six hundred fifty-seven thousand, nine hundred seventy-one".