3743681 has 2 divisors, whose sum is σ = 3743682. Its totient is φ = 3743680.

The previous prime is 3743671. The next prime is 3743683. The reversal of 3743681 is 1863473.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2265025 + 1478656 = 1505^2 + 1216^2 .

It is an emirp because it is prime and its reverse (1863473) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3743681 is a prime.

It is a super-2 number, since 2×3743681² = 28030294859522, which contains 22 as substring.

Together with 3743683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3743683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1871840 + 1871841.

It is an arithmetic number, because the mean of its divisors is an integer number (1871841).

Almost surely, 2^3743681 is an apocalyptic number.

It is an amenable number.

3743681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3743681 is an equidigital number, since it uses as much as digits as its factorization.

3743681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

The square root of 3743681 is about 1934.8594264184. The cubic root of 3743681 is about 155.2743113373.

The spelling of 3743681 in words is "three million, seven hundred forty-three thousand, six hundred eighty-one".