196121919 has 8 divisors (see below), whose sum is σ = 298852480. Its totient is φ = 112069656.

The previous prime is 196121899. The next prime is 196121963. The reversal of 196121919 is 919121691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 196121919 - 2¹⁵ = 196089151 is a prime.

It is a super-2 number, since 2×196121919² = 76927614224485122, 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 (196121999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4669549 + ... + 4669590.

It is an arithmetic number, because the mean of its divisors is an integer number (37356560).

Almost surely, 2^196121919 is an apocalyptic number.

196121919 is a deficient number, since it is larger than the sum of its proper divisors (102730561).

196121919 is an equidigital number, since it uses as much as digits as its factorization.

196121919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9339149.

The product of its digits is 8748, while the sum is 39.

The square root of 196121919 is about 14004.3535730858. The cubic root of 196121919 is about 580.9989907979.

The spelling of 196121919 in words is "one hundred ninety-six million, one hundred twenty-one thousand, nine hundred nineteen".