3964334521 has 32 divisors (see below), whose sum is σ = 4692787200. Its totient is φ = 3278880000.

The previous prime is 3964334503. The next prime is 3964334527. The reversal of 3964334521 is 1254334693.

It is a cyclic number.

It is not a de Polignac number, because 3964334521 - 2⁵ = 3964334489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3964334527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9885921 + ... + 9886321.

It is an arithmetic number, because the mean of its divisors is an integer number (146649600).

Almost surely, 2^3964334521 is an apocalyptic number.

It is an amenable number.

3964334521 is a deficient number, since it is larger than the sum of its proper divisors (728452679).

3964334521 is a wasteful number, since it uses less digits than its factorization.

3964334521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805.

The product of its digits is 233280, while the sum is 40.

The square root of 3964334521 is about 62962.9615011873. The cubic root of 3964334521 is about 1582.6690081852.

The spelling of 3964334521 in words is "three billion, nine hundred sixty-four million, three hundred thirty-four thousand, five hundred twenty-one".