3949987951 has 12 divisors (see below), whose sum is σ = 4948337352. Its totient is φ = 3125264688.

The previous prime is 3949987939. The next prime is 3949987967. The reversal of 3949987951 is 1597899493.

3949987951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-3949987951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949987051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3099825 + ... + 3101098.

It is an arithmetic number, because the mean of its divisors is an integer number (412361446).

Almost surely, 2^3949987951 is an apocalyptic number.

3949987951 is a deficient number, since it is larger than the sum of its proper divisors (998349401).

3949987951 is a wasteful number, since it uses less digits than its factorization.

3949987951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6200950 (or 6200943 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 64.

The square root of 3949987951 is about 62848.9295931124. The cubic root of 3949987951 is about 1580.7575215736.

The spelling of 3949987951 in words is "three billion, nine hundred forty-nine million, nine hundred eighty-seven thousand, nine hundred fifty-one".