196991670 has 64 divisors (see below), whose sum is σ = 491028480. Its totient is φ = 50524800.

The previous prime is 196991647. The next prime is 196991689. The reversal of 196991670 is 76199691.

196991670 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 177076 + ... + 178184.

It is an arithmetic number, because the mean of its divisors is an integer number (7672320).

Almost surely, 2^196991670 is an apocalyptic number.

196991670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

196991670 is the 11460-th pentagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 196991670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245514240).

196991670 is an abundant number, since it is smaller than the sum of its proper divisors (294036810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

196991670 is a wasteful number, since it uses less digits than its factorization.

196991670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341.

The product of its (nonzero) digits is 183708, while the sum is 48.

The square root of 196991670 is about 14035.3721005180. The cubic root of 196991670 is about 581.8565853927.

It can be divided in two parts, 1969 and 91670, that added together give a palindrome (93639).

The spelling of 196991670 in words is "one hundred ninety-six million, nine hundred ninety-one thousand, six hundred seventy".