3951749 has 2 divisors, whose sum is σ = 3951750. Its totient is φ = 3951748.

The previous prime is 3951737. The next prime is 3951767. The reversal of 3951749 is 9471593.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3062500 + 889249 = 1750^2 + 943^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3951749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3951719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1975874 + 1975875.

It is an arithmetic number, because the mean of its divisors is an integer number (1975875).

Almost surely, 2^3951749 is an apocalyptic number.

It is an amenable number.

3951749 is a deficient number, since it is larger than the sum of its proper divisors (1).

3951749 is an equidigital number, since it uses as much as digits as its factorization.

3951749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 38.

The square root of 3951749 is about 1987.9006514411. The cubic root of 3951749 is about 158.0992406497.

The spelling of 3951749 in words is "three million, nine hundred fifty-one thousand, seven hundred forty-nine".