196731931 has 4 divisors (see below), whose sum is σ = 214616664. Its totient is φ = 178847200.

The previous prime is 196731889. The next prime is 196731937. The reversal of 196731931 is 139137691.

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 196731931 - 2⁹ = 196731419 is a prime.

It is a super-2 number, since 2×196731931² = 77406905349977522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196731937) 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, 8942350 + ... + 8942371.

It is an arithmetic number, because the mean of its divisors is an integer number (53654166).

Almost surely, 2^196731931 is an apocalyptic number.

196731931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

196731931 is a deficient number, since it is larger than the sum of its proper divisors (17884733).

196731931 is a wasteful number, since it uses less digits than its factorization.

196731931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17884732.

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

The square root of 196731931 is about 14026.1160340274. The cubic root of 196731931 is about 581.6007415462.

The spelling of 196731931 in words is "one hundred ninety-six million, seven hundred thirty-one thousand, nine hundred thirty-one".