3949487 has 2 divisors, whose sum is σ = 3949488. Its totient is φ = 3949486.

The previous prime is 3949469. The next prime is 3949501. The reversal of 3949487 is 7849493.

It is a strong prime.

It is an emirp because it is prime and its reverse (7849493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3949487 - 2¹⁰ = 3948463 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 (3949087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1974743 + 1974744.

It is an arithmetic number, because the mean of its divisors is an integer number (1974744).

Almost surely, 2^3949487 is an apocalyptic number.

3949487 is a deficient number, since it is larger than the sum of its proper divisors (1).

3949487 is an equidigital number, since it uses as much as digits as its factorization.

3949487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 3949487 is about 1987.3316280883. The cubic root of 3949487 is about 158.0690693054.

The spelling of 3949487 in words is "three million, nine hundred forty-nine thousand, four hundred eighty-seven".