3959491 has 2 divisors, whose sum is σ = 3959492. Its totient is φ = 3959490.

The previous prime is 3959477. The next prime is 3959507. The reversal of 3959491 is 1949593.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3959491 - 2⁷ = 3959363 is a prime.

It is not a weakly prime, because it can be changed into another prime (3959441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1979745 + 1979746.

It is an arithmetic number, because the mean of its divisors is an integer number (1979746).

Almost surely, 2^3959491 is an apocalyptic number.

3959491 is a deficient number, since it is larger than the sum of its proper divisors (1).

3959491 is an equidigital number, since it uses as much as digits as its factorization.

3959491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 40.

The square root of 3959491 is about 1989.8469790414. The cubic root of 3959491 is about 158.2024190871.

The spelling of 3959491 in words is "three million, nine hundred fifty-nine thousand, four hundred ninety-one".