671343761 has 4 divisors (see below), whose sum is σ = 732375024. Its totient is φ = 610312500.

The previous prime is 671343749. The next prime is 671343767. The reversal of 671343761 is 167343176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671343761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671343767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30515615 + ... + 30515636.

It is an arithmetic number, because the mean of its divisors is an integer number (183093756).

Almost surely, 2^671343761 is an apocalyptic number.

It is an amenable number.

671343761 is a deficient number, since it is larger than the sum of its proper divisors (61031263).

671343761 is a wasteful number, since it uses less digits than its factorization.

671343761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61031262.

The product of its digits is 63504, while the sum is 38.

The square root of 671343761 is about 25910.3022174578. The cubic root of 671343761 is about 875.6186149514.

The spelling of 671343761 in words is "six hundred seventy-one million, three hundred forty-three thousand, seven hundred sixty-one".