3643481 has 2 divisors, whose sum is σ = 3643482. Its totient is φ = 3643480.

The previous prime is 3643477. The next prime is 3643483. The reversal of 3643481 is 1843463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3575881 + 67600 = 1891^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 3643481 - 2² = 3643477 is a prime.

It is a super-2 number, since 2×3643481² = 26549907594722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 3643483, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3643483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1821740 + 1821741.

It is an arithmetic number, because the mean of its divisors is an integer number (1821741).

Almost surely, 2^3643481 is an apocalyptic number.

It is an amenable number.

3643481 is a deficient number, since it is larger than the sum of its proper divisors (1).

3643481 is an equidigital number, since it uses as much as digits as its factorization.

3643481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 3643481 is about 1908.7904547121. The cubic root of 3643481 is about 153.8764540127.

The spelling of 3643481 in words is "three million, six hundred forty-three thousand, four hundred eighty-one".