196791831 has 6 divisors (see below), whose sum is σ = 284254880. Its totient is φ = 131194548.

The previous prime is 196791821. The next prime is 196791857. The reversal of 196791831 is 138197691.

It is not a de Polignac number, because 196791831 - 2⁹ = 196791319 is a prime.

It is a super-2 number, since 2×196791831² = 77454049496665122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196791811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10932871 + ... + 10932888.

Almost surely, 2^196791831 is an apocalyptic number.

196791831 is a deficient number, since it is larger than the sum of its proper divisors (87463049).

196791831 is a wasteful number, since it uses less digits than its factorization.

196791831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21865765 (or 21865762 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 196791831 is about 14028.2511739703. The cubic root of 196791831 is about 581.6597632296.

The spelling of 196791831 in words is "one hundred ninety-six million, seven hundred ninety-one thousand, eight hundred thirty-one".