3935121604 has 6 divisors (see below), whose sum is σ = 6886462814. Its totient is φ = 1967560800.

The previous prime is 3935121571. The next prime is 3935121607. The reversal of 3935121604 is 4061215393.

It can be written as a sum of positive squares in only one way, i.e., 3881539204 + 53582400 = 62302^2 + 7320^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3935121604.

It is not an unprimeable number, because it can be changed into a prime (3935121607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491890197 + ... + 491890204.

Almost surely, 2^3935121604 is an apocalyptic number.

It is an amenable number.

3935121604 is a deficient number, since it is larger than the sum of its proper divisors (2951341210).

3935121604 is a wasteful number, since it uses less digits than its factorization.

3935121604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983780405 (or 983780403 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 3935121604 is about 62730.5476143800. The cubic root of 3935121604 is about 1578.7718924259.

Adding to 3935121604 its reverse (4061215393), we get a palindrome (7996336997).

The spelling of 3935121604 in words is "three billion, nine hundred thirty-five million, one hundred twenty-one thousand, six hundred four".