671017869 has 6 divisors (see below), whose sum is σ = 969248046. Its totient is φ = 447345240.

The previous prime is 671017817. The next prime is 671017871. The reversal of 671017869 is 968710176.

It can be written as a sum of positive squares in only one way, i.e., 339959844 + 331058025 = 18438^2 + 18195^2 .

It is not a de Polignac number, because 671017869 - 2⁷ = 671017741 is a prime.

It is a super-2 number, since 2×671017869² = 900529961034602322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671017169) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37278762 + ... + 37278779.

It is an arithmetic number, because the mean of its divisors is an integer number (161541341).

Almost surely, 2^671017869 is an apocalyptic number.

It is an amenable number.

671017869 is a deficient number, since it is larger than the sum of its proper divisors (298230177).

671017869 is a wasteful number, since it uses less digits than its factorization.

671017869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74557547 (or 74557544 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 671017869 is about 25904.0126042279. The cubic root of 671017869 is about 875.4769074763.

The spelling of 671017869 in words is "six hundred seventy-one million, seventeen thousand, eight hundred sixty-nine".