3967489 has 2 divisors, whose sum is σ = 3967490. Its totient is φ = 3967488.

The previous prime is 3967487. The next prime is 3967493. The reversal of 3967489 is 9847693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3920400 + 47089 = 1980^2 + 217^2 .

It is a cyclic number.

It is not a de Polignac number, because 3967489 - 2¹ = 3967487 is a prime.

Together with 3967487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3967487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1983744 + 1983745.

It is an arithmetic number, because the mean of its divisors is an integer number (1983745).

Almost surely, 2^3967489 is an apocalyptic number.

It is an amenable number.

3967489 is a deficient number, since it is larger than the sum of its proper divisors (1).

3967489 is an equidigital number, since it uses as much as digits as its factorization.

3967489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 3967489 is about 1991.8556674619. The cubic root of 3967489 is about 158.3088681189.

It can be divided in two parts, 39 and 67489, that added together give a triangular number (67528 = T₃₆₇).

The spelling of 3967489 in words is "three million, nine hundred sixty-seven thousand, four hundred eighty-nine".