670172647 has 4 divisors (see below), whose sum is σ = 674670600. Its totient is φ = 665674696.

The previous prime is 670172611. The next prime is 670172717. The reversal of 670172647 is 746271076.

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

It is a cyclic number.

It is not a de Polignac number, because 670172647 - 2¹⁵ = 670139879 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 (679172647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2248753 + ... + 2249050.

It is an arithmetic number, because the mean of its divisors is an integer number (168667650).

Almost surely, 2^670172647 is an apocalyptic number.

670172647 is a deficient number, since it is larger than the sum of its proper divisors (4497953).

670172647 is a wasteful number, since it uses less digits than its factorization.

670172647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4497952.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 670172647 is about 25887.6929640322. The cubic root of 670172647 is about 875.1091660260.

The spelling of 670172647 in words is "six hundred seventy million, one hundred seventy-two thousand, six hundred forty-seven".