6631947 has 12 divisors (see below), whose sum is σ = 10948080. Its totient is φ = 3789648.

The previous prime is 6631939. The next prime is 6631951. The reversal of 6631947 is 7491366.

6631947 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6631947 - 2³ = 6631939 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6631907) 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, 52572 + ... + 52697.

It is an arithmetic number, because the mean of its divisors is an integer number (912340).

Almost surely, 2^6631947 is an apocalyptic number.

6631947 is a deficient number, since it is larger than the sum of its proper divisors (4316133).

6631947 is a wasteful number, since it uses less digits than its factorization.

6631947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105282 (or 105279 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 6631947 is about 2575.2566862354. The cubic root of 6631947 is about 187.8799123686.

It can be divided in two parts, 66319 and 47, that added together give a palindrome (66366).

The spelling of 6631947 in words is "six million, six hundred thirty-one thousand, nine hundred forty-seven".