196121858 has 8 divisors (see below), whose sum is σ = 295017228. Its totient is φ = 97782784.

The previous prime is 196121837. The next prime is 196121869. The reversal of 196121858 is 858121691.

It can be written as a sum of positive squares in 2 ways, for example, as 175483009 + 20638849 = 13247^2 + 4543^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138191 + ... + 139602.

Almost surely, 2^196121858 is an apocalyptic number.

196121858 is a deficient number, since it is larger than the sum of its proper divisors (98895370).

196121858 is a wasteful number, since it uses less digits than its factorization.

196121858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278148.

The product of its digits is 34560, while the sum is 41.

The square root of 196121858 is about 14004.3513951914. The cubic root of 196121858 is about 580.9989305617.

The spelling of 196121858 in words is "one hundred ninety-six million, one hundred twenty-one thousand, eight hundred fifty-eight".