3967864965 has 12 divisors (see below), whose sum is σ = 6877632684. Its totient is φ = 2116194624.

The previous prime is 3967864951. The next prime is 3967864969. The reversal of 3967864965 is 5694687693.

3967864965 is a `hidden beast` number, since 3 + 9 + 67 + 86 + 496 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2705768289 + 1262096676 = 52017^2 + 35526^2 .

It is not a de Polignac number, because 3967864965 - 2²⁸ = 3699429509 is a prime.

It is a super-3 number, since 3×3967864965³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3967864969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44087344 + ... + 44087433.

It is an arithmetic number, because the mean of its divisors is an integer number (573136057).

Almost surely, 2^3967864965 is an apocalyptic number.

It is an amenable number.

3967864965 is a deficient number, since it is larger than the sum of its proper divisors (2909767719).

3967864965 is a wasteful number, since it uses less digits than its factorization.

3967864965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88174788 (or 88174785 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 63.

The square root of 3967864965 is about 62990.9911415910. The cubic root of 3967864965 is about 1583.1386848683.

The spelling of 3967864965 in words is "three billion, nine hundred sixty-seven million, eight hundred sixty-four thousand, nine hundred sixty-five".