3935121646 has 8 divisors (see below), whose sum is σ = 5906355840. Its totient is φ = 1966336368.

The previous prime is 3935121637. The next prime is 3935121647. The reversal of 3935121646 is 6461215393.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 3935121599 and 3935121608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3935121647) 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 3 ways as a sum of consecutive naturals, for example, 608206 + ... + 614641.

It is an arithmetic number, because the mean of its divisors is an integer number (738294480).

Almost surely, 2^3935121646 is an apocalyptic number.

3935121646 is a deficient number, since it is larger than the sum of its proper divisors (1971234194).

3935121646 is a wasteful number, since it uses less digits than its factorization.

3935121646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224458.

The product of its digits is 116640, while the sum is 40.

The square root of 3935121646 is about 62730.5479491452. The cubic root of 3935121646 is about 1578.7718980427.

The spelling of 3935121646 in words is "three billion, nine hundred thirty-five million, one hundred twenty-one thousand, six hundred forty-six".