671365069 has 4 divisors (see below), whose sum is σ = 671446044. Its totient is φ = 671284096.

The previous prime is 671365067. The next prime is 671365081. The reversal of 671365069 is 960563176.

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 375972100 + 295392969 = 19390^2 + 17187^2 .

It is a cyclic number.

It is not a de Polignac number, because 671365069 - 2¹ = 671365067 is a prime.

It is a super-2 number, since 2×671365069² = 901462111746749522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671365067) 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 3 ways as a sum of consecutive naturals, for example, 26422 + ... + 45175.

It is an arithmetic number, because the mean of its divisors is an integer number (167861511).

Almost surely, 2^671365069 is an apocalyptic number.

It is an amenable number.

671365069 is a deficient number, since it is larger than the sum of its proper divisors (80975).

671365069 is an equidigital number, since it uses as much as digits as its factorization.

671365069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80974.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 671365069 is about 25910.7134019888. The cubic root of 671365069 is about 875.6278787023.

The spelling of 671365069 in words is "six hundred seventy-one million, three hundred sixty-five thousand, sixty-nine".