196717985 has 8 divisors (see below), whose sum is σ = 239931816. Its totient is φ = 154794240.

The previous prime is 196717907. The next prime is 196718009. The reversal of 196717985 is 589717691.

It can be written as a sum of positive squares in 4 ways, for example, as 913936 + 195804049 = 956^2 + 13993^2 .

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

It is not a de Polignac number, because 196717985 - 2¹⁴ = 196701601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322184 + ... + 322793.

It is an arithmetic number, because the mean of its divisors is an integer number (29991477).

Almost surely, 2^196717985 is an apocalyptic number.

It is an amenable number.

196717985 is a deficient number, since it is larger than the sum of its proper divisors (43213831).

196717985 is an equidigital number, since it uses as much as digits as its factorization.

196717985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645043.

The product of its digits is 952560, while the sum is 53.

The square root of 196717985 is about 14025.6188811760. The cubic root of 196717985 is about 581.5869983178.

The spelling of 196717985 in words is "one hundred ninety-six million, seven hundred seventeen thousand, nine hundred eighty-five".