670528169 has 4 divisors (see below), whose sum is σ = 693649860. Its totient is φ = 647406480.

The previous prime is 670528153. The next prime is 670528207. The reversal of 670528169 is 961825076.

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 562638400 + 107889769 = 23720^2 + 10387^2 .

It is a cyclic number.

It is not a de Polignac number, because 670528169 - 2⁴ = 670528153 is a prime.

It is a super-2 number, since 2×670528169² = 899216050844985122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670528139) 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, 11560802 + ... + 11560859.

It is an arithmetic number, because the mean of its divisors is an integer number (173412465).

Almost surely, 2^670528169 is an apocalyptic number.

It is an amenable number.

670528169 is a deficient number, since it is larger than the sum of its proper divisors (23121691).

670528169 is a wasteful number, since it uses less digits than its factorization.

670528169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23121690.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 670528169 is about 25894.5586755210. The cubic root of 670528169 is about 875.2638851434.

The spelling of 670528169 in words is "six hundred seventy million, five hundred twenty-eight thousand, one hundred sixty-nine".