3651671 has 2 divisors, whose sum is σ = 3651672. Its totient is φ = 3651670.

The previous prime is 3651653. The next prime is 3651673. The reversal of 3651671 is 1761563.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3651671 - 2⁶ = 3651607 is a prime.

Together with 3651673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3651673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1825835 + 1825836.

It is an arithmetic number, because the mean of its divisors is an integer number (1825836).

Almost surely, 2^3651671 is an apocalyptic number.

3651671 is a deficient number, since it is larger than the sum of its proper divisors (1).

3651671 is an equidigital number, since it uses as much as digits as its factorization.

3651671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 29.

The square root of 3651671 is about 1910.9345881008. The cubic root of 3651671 is about 153.9916648100.

The spelling of 3651671 in words is "three million, six hundred fifty-one thousand, six hundred seventy-one".