6631147 has 2 divisors, whose sum is σ = 6631148. Its totient is φ = 6631146.

The previous prime is 6631129. The next prime is 6631151. The reversal of 6631147 is 7411366.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6631147 is a prime.

It is a super-2 number, since 2×6631147² = 87944221071218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6631447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3315573 + 3315574.

It is an arithmetic number, because the mean of its divisors is an integer number (3315574).

Almost surely, 2^6631147 is an apocalyptic number.

6631147 is a deficient number, since it is larger than the sum of its proper divisors (1).

6631147 is an equidigital number, since it uses as much as digits as its factorization.

6631147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 6631147 is about 2575.1013572285. The cubic root of 6631147 is about 187.8723575246.

It can be divided in two parts, 66 and 31147, that added together give a palindrome (31213).

The spelling of 6631147 in words is "six million, six hundred thirty-one thousand, one hundred forty-seven".