169920970 has 8 divisors (see below), whose sum is σ = 305857764. Its totient is φ = 67968384.

The previous prime is 169920953. The next prime is 169920973. The reversal of 169920970 is 79029961.

It can be written as a sum of positive squares in 2 ways, for example, as 166952241 + 2968729 = 12921^2 + 1723^2 .

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

It is not an unprimeable number, because it can be changed into a prime (169920973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8496039 + ... + 8496058.

Almost surely, 2^169920970 is an apocalyptic number.

169920970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

169920970 is a deficient number, since it is larger than the sum of its proper divisors (135936794).

169920970 is a wasteful number, since it uses less digits than its factorization.

169920970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16992104.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 169920970 is about 13035.3737959446. The cubic root of 169920970 is about 553.8799693909.

The spelling of 169920970 in words is "one hundred sixty-nine million, nine hundred twenty thousand, nine hundred seventy".