3925128099 has 8 divisors (see below), whose sum is σ = 5239745280. Its totient is φ = 2613631496.

The previous prime is 3925128049. The next prime is 3925128157. The reversal of 3925128099 is 9908215293.

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

It is a cyclic number.

It is not a de Polignac number, because 3925128099 - 2⁷ = 3925127971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3925128029) 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 7 ways as a sum of consecutive naturals, for example, 777207 + ... + 782240.

It is an arithmetic number, because the mean of its divisors is an integer number (654968160).

Almost surely, 2^3925128099 is an apocalyptic number.

3925128099 is a deficient number, since it is larger than the sum of its proper divisors (1314617181).

3925128099 is a wasteful number, since it uses less digits than its factorization.

3925128099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560289.

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 3925128099 is about 62650.8427636852. The cubic root of 3925128099 is about 1577.4342938083.

The spelling of 3925128099 in words is "three billion, nine hundred twenty-five million, one hundred twenty-eight thousand, ninety-nine".