670173517 has 32 divisors (see below), whose sum is σ = 778272768. Its totient is φ = 572273856.

The previous prime is 670173451. The next prime is 670173521. The reversal of 670173517 is 715371076.

It is a happy number.

670173517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 670173517 - 2¹⁵ = 670140749 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670173527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1447228 + ... + 1447690.

It is an arithmetic number, because the mean of its divisors is an integer number (24321024).

Almost surely, 2^670173517 is an apocalyptic number.

It is an amenable number.

670173517 is a deficient number, since it is larger than the sum of its proper divisors (108099251).

670173517 is a wasteful number, since it uses less digits than its factorization.

670173517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

The product of its (nonzero) digits is 30870, while the sum is 37.

The square root of 670173517 is about 25887.7097673780. The cubic root of 670173517 is about 875.1095447069.

The spelling of 670173517 in words is "six hundred seventy million, one hundred seventy-three thousand, five hundred seventeen".