671641147 has 6 divisors (see below), whose sum is σ = 702113132. Its totient is φ = 642438852.

The previous prime is 671641129. The next prime is 671641163. The reversal of 671641147 is 741146176.

It is a de Polignac number, because none of the positive numbers 2^k-671641147 is a prime.

It is a super-2 number, since 2×671641147² = 902203660686951218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671341147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 634293 + ... + 635350.

Almost surely, 2^671641147 is an apocalyptic number.

671641147 is a deficient number, since it is larger than the sum of its proper divisors (30471985).

671641147 is a wasteful number, since it uses less digits than its factorization.

671641147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269689 (or 1269666 counting only the distinct ones).

The product of its digits is 28224, while the sum is 37.

The square root of 671641147 is about 25916.0403418423. The cubic root of 671641147 is about 875.7478871627.

The spelling of 671641147 in words is "six hundred seventy-one million, six hundred forty-one thousand, one hundred forty-seven".