194366881 has 2 divisors, whose sum is σ = 194366882. Its totient is φ = 194366880.

The previous prime is 194366873. The next prime is 194366911. The reversal of 194366881 is 188663491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156125025 + 38241856 = 12495^2 + 6184^2 .

It is a cyclic number.

It is not a de Polignac number, because 194366881 - 2³ = 194366873 is a prime.

It is a super-2 number, since 2×194366881² = 75556968859336322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (194366681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97183440 + 97183441.

It is an arithmetic number, because the mean of its divisors is an integer number (97183441).

Almost surely, 2^194366881 is an apocalyptic number.

It is an amenable number.

194366881 is a deficient number, since it is larger than the sum of its proper divisors (1).

194366881 is an equidigital number, since it uses as much as digits as its factorization.

194366881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 46.

The square root of 194366881 is about 13941.5523167257. The cubic root of 194366881 is about 579.2607317315.

The spelling of 194366881 in words is "one hundred ninety-four million, three hundred sixty-six thousand, eight hundred eighty-one".