196958819 has 4 divisors (see below), whose sum is σ = 196992120. Its totient is φ = 196925520.

The previous prime is 196958809. The next prime is 196958843. The reversal of 196958819 is 918859691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 918859691 = 277 ⋅3317183.

It is a cyclic number.

It is not a de Polignac number, because 196958819 - 2⁴ = 196958803 is a prime.

It is a super-2 number, since 2×196958819² = 77585552763749522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196958809) 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, 5114 + ... + 20495.

It is an arithmetic number, because the mean of its divisors is an integer number (49248030).

Almost surely, 2^196958819 is an apocalyptic number.

196958819 is a deficient number, since it is larger than the sum of its proper divisors (33301).

196958819 is an equidigital number, since it uses as much as digits as its factorization.

196958819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33300.

The product of its digits is 1399680, while the sum is 56.

The square root of 196958819 is about 14034.2017585611. The cubic root of 196958819 is about 581.8242394677.

The spelling of 196958819 in words is "one hundred ninety-six million, nine hundred fifty-eight thousand, eight hundred nineteen".