3897749 has 2 divisors, whose sum is σ = 3897750. Its totient is φ = 3897748.

The previous prime is 3897739. The next prime is 3897797. The reversal of 3897749 is 9477983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3775249 + 122500 = 1943^2 + 350^2 .

It is a cyclic number.

It is not a de Polignac number, because 3897749 - 2²⁰ = 2849173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3897739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1948874 + 1948875.

It is an arithmetic number, because the mean of its divisors is an integer number (1948875).

Almost surely, 2^3897749 is an apocalyptic number.

It is an amenable number.

3897749 is a deficient number, since it is larger than the sum of its proper divisors (1).

3897749 is an equidigital number, since it uses as much as digits as its factorization.

3897749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 3897749 is about 1974.2717644742. The cubic root of 3897749 is about 157.3758019791.

The spelling of 3897749 in words is "three million, eight hundred ninety-seven thousand, seven hundred forty-nine".