194200312291 has 2 divisors, whose sum is σ = 194200312292. Its totient is φ = 194200312290.

The previous prime is 194200312283. The next prime is 194200312399. The reversal of 194200312291 is 192213002491.

It is a weak prime.

It is an emirp because it is prime and its reverse (192213002491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194200312291 - 2³ = 194200312283 is a prime.

It is a super-2 number, since 2×194200312291² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (194200312211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97100156145 + 97100156146.

It is an arithmetic number, because the mean of its divisors is an integer number (97100156146).

Almost surely, 2^194200312291 is an apocalyptic number.

194200312291 is a deficient number, since it is larger than the sum of its proper divisors (1).

194200312291 is an equidigital number, since it uses as much as digits as its factorization.

194200312291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 194200312291 in words is "one hundred ninety-four billion, two hundred million, three hundred twelve thousand, two hundred ninety-one".