3931490847 has 16 divisors (see below), whose sum is σ = 5317589088. Its totient is φ = 2583244800.

The previous prime is 3931490831. The next prime is 3931490891. The reversal of 3931490847 is 7480941393.

It is a happy number.

It is not a de Polignac number, because 3931490847 - 2⁴ = 3931490831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3931490796 and 3931490805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3931492847) 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, 345013 + ... + 356225.

It is an arithmetic number, because the mean of its divisors is an integer number (332349318).

Almost surely, 2^3931490847 is an apocalyptic number.

3931490847 is a deficient number, since it is larger than the sum of its proper divisors (1386098241).

3931490847 is a wasteful number, since it uses less digits than its factorization.

3931490847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12890.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 3931490847 is about 62701.6016302614. The cubic root of 3931490847 is about 1578.2861894406.

The spelling of 3931490847 in words is "three billion, nine hundred thirty-one million, four hundred ninety thousand, eight hundred forty-seven".