3925439647 has 16 divisors (see below), whose sum is σ = 4203601920. Its totient is φ = 3657262752.

The previous prime is 3925439591. The next prime is 3925439659. The reversal of 3925439647 is 7469345293.

It is a happy number.

It is not a de Polignac number, because 3925439647 - 2¹⁹ = 3924915359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3925439594 and 3925439603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3925439677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157858 + ... + 181024.

It is an arithmetic number, because the mean of its divisors is an integer number (262725120).

Almost surely, 2^3925439647 is an apocalyptic number.

3925439647 is a deficient number, since it is larger than the sum of its proper divisors (278162273).

3925439647 is a wasteful number, since it uses less digits than its factorization.

3925439647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23382.

The product of its digits is 4898880, while the sum is 52.

The square root of 3925439647 is about 62653.3290975029. The cubic root of 3925439647 is about 1577.4760277751.

The spelling of 3925439647 in words is "three billion, nine hundred twenty-five million, four hundred thirty-nine thousand, six hundred forty-seven".