3915965997 has 12 divisors (see below), whose sum is σ = 5989124700. Its totient is φ = 2457076608.

The previous prime is 3915965983. The next prime is 3915966013. The reversal of 3915965997 is 7995695193.

It is a happy number.

3915965997 is a `hidden beast` number, since 39 + 1 + 5 + 9 + 6 + 599 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2482132041 + 1433833956 = 49821^2 + 37866^2 .

It is not a de Polignac number, because 3915965997 - 2⁴ = 3915965981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3915965957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12797122 + ... + 12797427.

It is an arithmetic number, because the mean of its divisors is an integer number (499093725).

Almost surely, 2^3915965997 is an apocalyptic number.

It is an amenable number.

3915965997 is a deficient number, since it is larger than the sum of its proper divisors (2073158703).

3915965997 is a wasteful number, since it uses less digits than its factorization.

3915965997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25594572 (or 25594569 counting only the distinct ones).

The product of its digits is 20667150, while the sum is 63.

The square root of 3915965997 is about 62577.6797029100. The cubic root of 3915965997 is about 1576.2059794434.

The spelling of 3915965997 in words is "three billion, nine hundred fifteen million, nine hundred sixty-five thousand, nine hundred ninety-seven".