670172389 has 8 divisors (see below), whose sum is σ = 720455040. Its totient is φ = 621390816.

The previous prime is 670172383. The next prime is 670172407. The reversal of 670172389 is 983271076.

It is a happy number.

670172389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 670172389 - 2⁹ = 670171877 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 (670172383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374344 + ... + 376129.

It is an arithmetic number, because the mean of its divisors is an integer number (90056880).

Almost surely, 2^670172389 is an apocalyptic number.

It is an amenable number.

670172389 is a deficient number, since it is larger than the sum of its proper divisors (50282651).

670172389 is a wasteful number, since it uses less digits than its factorization.

670172389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750539.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 670172389 is about 25887.6879809689. The cubic root of 670172389 is about 875.1090537275.

The spelling of 670172389 in words is "six hundred seventy million, one hundred seventy-two thousand, three hundred eighty-nine".