671223365 has 4 divisors (see below), whose sum is σ = 805468044. Its totient is φ = 536978688.

The previous prime is 671223361. The next prime is 671223373. The reversal of 671223365 is 563322176.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 259660996 + 411562369 = 16114^2 + 20287^2 .

It is a cyclic number.

It is not a de Polignac number, because 671223365 - 2² = 671223361 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671223361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67122332 + ... + 67122341.

It is an arithmetic number, because the mean of its divisors is an integer number (201367011).

Almost surely, 2^671223365 is an apocalyptic number.

It is an amenable number.

671223365 is a deficient number, since it is larger than the sum of its proper divisors (134244679).

671223365 is a wasteful number, since it uses less digits than its factorization.

671223365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134244678.

The product of its digits is 45360, while the sum is 35.

The square root of 671223365 is about 25907.9787903263. The cubic root of 671223365 is about 875.5662685543.

The spelling of 671223365 in words is "six hundred seventy-one million, two hundred twenty-three thousand, three hundred sixty-five".