196590891 has 48 divisors (see below), whose sum is σ = 326678400. Its totient is φ = 104533632.

The previous prime is 196590887. The next prime is 196590893. The reversal of 196590891 is 198095691.

It is not a de Polignac number, because 196590891 - 2² = 196590887 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 196590891.

It is not an unprimeable number, because it can be changed into a prime (196590893) 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 47 ways as a sum of consecutive naturals, for example, 164191 + ... + 165383.

It is an arithmetic number, because the mean of its divisors is an integer number (6805800).

Almost surely, 2^196590891 is an apocalyptic number.

196590891 is a deficient number, since it is larger than the sum of its proper divisors (130087509).

196590891 is a wasteful number, since it uses less digits than its factorization.

196590891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288 (or 1281 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 48.

The square root of 196590891 is about 14021.0873686744. The cubic root of 196590891 is about 581.4617222920.

The spelling of 196590891 in words is "one hundred ninety-six million, five hundred ninety thousand, eight hundred ninety-one".