3975749 has 2 divisors, whose sum is σ = 3975750. Its totient is φ = 3975748.

The previous prime is 3975721. The next prime is 3975779. The reversal of 3975749 is 9475793.

It is a happy number.

3975749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3678724 + 297025 = 1918^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 3975749 - 2⁸ = 3975493 is a prime.

It is a super-2 number, since 2×3975749² = 31613160222002, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3975709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1987874 + 1987875.

It is an arithmetic number, because the mean of its divisors is an integer number (1987875).

Almost surely, 2^3975749 is an apocalyptic number.

It is an amenable number.

3975749 is a deficient number, since it is larger than the sum of its proper divisors (1).

3975749 is an equidigital number, since it uses as much as digits as its factorization.

3975749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 44.

The square root of 3975749 is about 1993.9280328036. The cubic root of 3975749 is about 158.4186541689.

Adding to 3975749 its sum of digits (44), we get a palindrome (3975793).

The spelling of 3975749 in words is "three million, nine hundred seventy-five thousand, seven hundred forty-nine".