3923107521 has 16 divisors (see below), whose sum is σ = 5382087744. Its totient is φ = 2540026944.

The previous prime is 3923107519. The next prime is 3923107547. The reversal of 3923107521 is 1257013293.

It is not a de Polignac number, because 3923107521 - 2¹ = 3923107519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3923107571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28411 + ... + 93023.

It is an arithmetic number, because the mean of its divisors is an integer number (336380484).

Almost surely, 2^3923107521 is an apocalyptic number.

It is an amenable number.

3923107521 is a deficient number, since it is larger than the sum of its proper divisors (1458980223).

3923107521 is a wasteful number, since it uses less digits than its factorization.

3923107521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65200.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 3923107521 is about 62634.7149829869. The cubic root of 3923107521 is about 1577.1635700653.

The spelling of 3923107521 in words is "three billion, nine hundred twenty-three million, one hundred seven thousand, five hundred twenty-one".