3959106649 has 4 divisors (see below), whose sum is σ = 3959274420. Its totient is φ = 3958938880.

The previous prime is 3959106631. The next prime is 3959106713. The reversal of 3959106649 is 9466019593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9466019593 = 439 ⋅21562687.

It can be written as a sum of positive squares in 2 ways, for example, as 2242496025 + 1716610624 = 47355^2 + 41432^2 .

It is a cyclic number.

It is not a de Polignac number, because 3959106649 - 2¹⁹ = 3958582361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3959106596 and 3959106605.

It is not an unprimeable number, because it can be changed into a prime (3959106629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41272 + ... + 98089.

It is an arithmetic number, because the mean of its divisors is an integer number (989818605).

Almost surely, 2^3959106649 is an apocalyptic number.

It is an amenable number.

3959106649 is a deficient number, since it is larger than the sum of its proper divisors (167771).

3959106649 is a wasteful number, since it uses less digits than its factorization.

3959106649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167770.

The product of its (nonzero) digits is 1574640, while the sum is 52.

The square root of 3959106649 is about 62921.4323501937. The cubic root of 3959106649 is about 1581.9729997581.

The spelling of 3959106649 in words is "three billion, nine hundred fifty-nine million, one hundred six thousand, six hundred forty-nine".