196783831 has 4 divisors (see below), whose sum is σ = 196987464. Its totient is φ = 196580200.

The previous prime is 196783801. The next prime is 196783889. The reversal of 196783831 is 138387691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138387691 = 13 ⋅10645207.

It is a cyclic number.

It is not a de Polignac number, because 196783831 - 2⁵ = 196783799 is a prime.

It is a super-2 number, since 2×196783831² = 77447752286073122, 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 (196783801) 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 3 ways as a sum of consecutive naturals, for example, 100360 + ... + 102301.

It is an arithmetic number, because the mean of its divisors is an integer number (49246866).

Almost surely, 2^196783831 is an apocalyptic number.

196783831 is a deficient number, since it is larger than the sum of its proper divisors (203633).

196783831 is an equidigital number, since it uses as much as digits as its factorization.

196783831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203632.

The product of its digits is 217728, while the sum is 46.

The square root of 196783831 is about 14027.9660321801. The cubic root of 196783831 is about 581.6518812270.

The spelling of 196783831 in words is "one hundred ninety-six million, seven hundred eighty-three thousand, eight hundred thirty-one".