196000921 has 2 divisors, whose sum is σ = 196000922. Its totient is φ = 196000920.

The previous prime is 196000919. The next prime is 196000927. The reversal of 196000921 is 129000691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154256400 + 41744521 = 12420^2 + 6461^2 .

It is a cyclic number.

It is not a de Polignac number, because 196000921 - 2¹ = 196000919 is a prime.

It is a super-2 number, since 2×196000921² = 76832722065696482, which contains 22 as substring.

Together with 196000919, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 196000921.

It is not a weakly prime, because it can be changed into another prime (196000927) 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 as a sum of consecutive naturals, namely, 98000460 + 98000461.

It is an arithmetic number, because the mean of its divisors is an integer number (98000461).

Almost surely, 2^196000921 is an apocalyptic number.

It is an amenable number.

196000921 is a deficient number, since it is larger than the sum of its proper divisors (1).

196000921 is an equidigital number, since it uses as much as digits as its factorization.

196000921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 196000921 is about 14000.0328928185. The cubic root of 196000921 is about 580.8794832005.

The spelling of 196000921 in words is "one hundred ninety-six million, nine hundred twenty-one", and thus it is an aban number.