3949541 has 2 divisors, whose sum is σ = 3949542. Its totient is φ = 3949540.

The previous prime is 3949531. The next prime is 3949579. The reversal of 3949541 is 1459493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3500641 + 448900 = 1871^2 + 670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3949541 is a prime.

It is a super-2 number, since 2×3949541² = 31197748221362, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3949501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1974770 + 1974771.

It is an arithmetic number, because the mean of its divisors is an integer number (1974771).

Almost surely, 2^3949541 is an apocalyptic number.

It is an amenable number.

3949541 is a deficient number, since it is larger than the sum of its proper divisors (1).

3949541 is an equidigital number, since it uses as much as digits as its factorization.

3949541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 3949541 is about 1987.3452140984. The cubic root of 3949541 is about 158.0697897104.

The spelling of 3949541 in words is "three million, nine hundred forty-nine thousand, five hundred forty-one".