3745649 has 2 divisors, whose sum is σ = 3745650. Its totient is φ = 3745648.

The previous prime is 3745631. The next prime is 3745663. The reversal of 3745649 is 9465473.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2745649 + 1000000 = 1657^2 + 1000^2 .

It is an emirp because it is prime and its reverse (9465473) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3745649 - 2⁸ = 3745393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3745249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1872824 + 1872825.

It is an arithmetic number, because the mean of its divisors is an integer number (1872825).

Almost surely, 2^3745649 is an apocalyptic number.

It is an amenable number.

3745649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3745649 is an equidigital number, since it uses as much as digits as its factorization.

3745649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 3745649 is about 1935.3679236776. The cubic root of 3745649 is about 155.3015150720.

The spelling of 3745649 in words is "three million, seven hundred forty-five thousand, six hundred forty-nine".