671533647 has 8 divisors (see below), whose sum is σ = 895503360. Its totient is φ = 447626520.

The previous prime is 671533607. The next prime is 671533649. The reversal of 671533647 is 746335176.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 671533647 - 2¹⁴ = 671517263 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 671533599 and 671533608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671533649) 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 7 ways as a sum of consecutive naturals, for example, 23104 + ... + 43322.

It is an arithmetic number, because the mean of its divisors is an integer number (111937920).

Almost surely, 2^671533647 is an apocalyptic number.

671533647 is a deficient number, since it is larger than the sum of its proper divisors (223969713).

671533647 is a wasteful number, since it uses less digits than its factorization.

671533647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31293.

The product of its digits is 317520, while the sum is 42.

The square root of 671533647 is about 25913.9662537405. The cubic root of 671533647 is about 875.7011618534.

The spelling of 671533647 in words is "six hundred seventy-one million, five hundred thirty-three thousand, six hundred forty-seven".