196331791 has 4 divisors (see below), whose sum is σ = 196385832. Its totient is φ = 196277752.

The previous prime is 196331777. The next prime is 196331803. The reversal of 196331791 is 197133691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 196331791 - 2¹¹ = 196329743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196331701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21145 + ... + 28978.

It is an arithmetic number, because the mean of its divisors is an integer number (49096458).

Almost surely, 2^196331791 is an apocalyptic number.

196331791 is a deficient number, since it is larger than the sum of its proper divisors (54041).

196331791 is an equidigital number, since it uses as much as digits as its factorization.

196331791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54040.

The product of its digits is 30618, while the sum is 40.

The square root of 196331791 is about 14011.8446679943. The cubic root of 196331791 is about 581.2061611674.

The spelling of 196331791 in words is "one hundred ninety-six million, three hundred thirty-one thousand, seven hundred ninety-one".