3995523847 has 24 divisors (see below), whose sum is σ = 4793964480. Its totient is φ = 3317872320.

The previous prime is 3995523823. The next prime is 3995523853. The reversal of 3995523847 is 7483255993.

It is a de Polignac number, because none of the positive numbers 2^k-3995523847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3995523047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 428697 + ... + 437917.

It is an arithmetic number, because the mean of its divisors is an integer number (199748520).

Almost surely, 2^3995523847 is an apocalyptic number.

3995523847 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

3995523847 is a deficient number, since it is larger than the sum of its proper divisors (798440633).

3995523847 is a wasteful number, since it uses less digits than its factorization.

3995523847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9511 (or 9504 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 55.

The square root of 3995523847 is about 63210.1562013574. The cubic root of 3995523847 is about 1586.8087101304.

The spelling of 3995523847 in words is "three billion, nine hundred ninety-five million, five hundred twenty-three thousand, eight hundred forty-seven".