1194194381 has 2 divisors, whose sum is σ = 1194194382. Its totient is φ = 1194194380.

The previous prime is 1194194347. The next prime is 1194194401. The reversal of 1194194381 is 1834914911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 990675625 + 203518756 = 31475^2 + 14266^2 .

It is a cyclic number.

It is not a de Polignac number, because 1194194381 - 2²⁶ = 1127085517 is a prime.

It is a super-2 number, since 2×1194194381² = 2852200439223946322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1194194311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597097190 + 597097191.

It is an arithmetic number, because the mean of its divisors is an integer number (597097191).

Almost surely, 2^1194194381 is an apocalyptic number.

It is an amenable number.

1194194381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1194194381 is an equidigital number, since it uses as much as digits as its factorization.

1194194381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 41.

The square root of 1194194381 is about 34557.1176604763. The cubic root of 1194194381 is about 1060.9420784018.

The spelling of 1194194381 in words is "one billion, one hundred ninety-four million, one hundred ninety-four thousand, three hundred eighty-one".