670143869 has 4 divisors (see below), whose sum is σ = 679323996. Its totient is φ = 660963744.

The previous prime is 670143841. The next prime is 670143911. The reversal of 670143869 is 968341076.

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 287472025 + 382671844 = 16955^2 + 19562^2 .

It is a cyclic number.

It is not a de Polignac number, because 670143869 - 2²⁰ = 669095293 is a prime.

It is a super-2 number, since 2×670143869² = 898185610316578322, 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 (670143809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4589954 + ... + 4590099.

It is an arithmetic number, because the mean of its divisors is an integer number (169830999).

Almost surely, 2^670143869 is an apocalyptic number.

It is an amenable number.

670143869 is a deficient number, since it is larger than the sum of its proper divisors (9180127).

670143869 is an equidigital number, since it uses as much as digits as its factorization.

670143869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9180126.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 670143869 is about 25887.1371341058. The cubic root of 670143869 is about 875.0966397752.

The spelling of 670143869 in words is "six hundred seventy million, one hundred forty-three thousand, eight hundred sixty-nine".