3969913 has 4 divisors (see below), whose sum is σ = 3977460. Its totient is φ = 3962368.

The previous prime is 3969899. The next prime is 3969923. The reversal of 3969913 is 3199693.

3969913 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3199693 = 7 ⋅457099.

It can be written as a sum of positive squares in 2 ways, for example, as 719104 + 3250809 = 848^2 + 1803^2 .

It is a cyclic number.

It is not a de Polignac number, because 3969913 - 2¹³ = 3961721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3969923) 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 in 3 ways as a sum of consecutive naturals, for example, 2920 + ... + 4057.

It is an arithmetic number, because the mean of its divisors is an integer number (994365).

Almost surely, 2^3969913 is an apocalyptic number.

It is an amenable number.

3969913 is a deficient number, since it is larger than the sum of its proper divisors (7547).

3969913 is an equidigital number, since it uses as much as digits as its factorization.

3969913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7546.

The product of its digits is 39366, while the sum is 40.

The square root of 3969913 is about 1992.4640523733. The cubic root of 3969913 is about 158.3411019888.

The spelling of 3969913 in words is "three million, nine hundred sixty-nine thousand, nine hundred thirteen".