671213751 has 12 divisors (see below), whose sum is σ = 969090408. Its totient is φ = 413054304.

The previous prime is 671213749. The next prime is 671213759. The reversal of 671213751 is 157312176.

It is not a de Polignac number, because 671213751 - 2¹ = 671213749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671213759) 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 11 ways as a sum of consecutive naturals, for example, 661440 + ... + 662453.

It is an arithmetic number, because the mean of its divisors is an integer number (80757534).

Almost surely, 2^671213751 is an apocalyptic number.

671213751 is a deficient number, since it is larger than the sum of its proper divisors (297876657).

671213751 is a wasteful number, since it uses less digits than its factorization.

671213751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323922 (or 1323909 counting only the distinct ones).

The product of its digits is 8820, while the sum is 33.

The square root of 671213751 is about 25907.7932483645. The cubic root of 671213751 is about 875.5620882597.

The spelling of 671213751 in words is "six hundred seventy-one million, two hundred thirteen thousand, seven hundred fifty-one".