196404823 has 4 divisors (see below), whose sum is σ = 198891040. Its totient is φ = 193918608.

The previous prime is 196404799. The next prime is 196404833. The reversal of 196404823 is 328404691.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196404823 is a prime.

It is a super-2 number, since 2×196404823² = 77149708995322658, 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 (196404833) 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 3 ways as a sum of consecutive naturals, for example, 1242990 + ... + 1243147.

It is an arithmetic number, because the mean of its divisors is an integer number (49722760).

Almost surely, 2^196404823 is an apocalyptic number.

196404823 is a deficient number, since it is larger than the sum of its proper divisors (2486217).

196404823 is an equidigital number, since it uses as much as digits as its factorization.

196404823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486216.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 196404823 is about 14014.4505065308. The cubic root of 196404823 is about 581.2782184165.

The spelling of 196404823 in words is "one hundred ninety-six million, four hundred four thousand, eight hundred twenty-three".