194723231 has 2 divisors, whose sum is σ = 194723232. Its totient is φ = 194723230.

The previous prime is 194723203. The next prime is 194723233. The reversal of 194723231 is 132327491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194723231 - 2⁶ = 194723167 is a prime.

It is a super-2 number, since 2×194723231² = 75834273382158722, which contains 22 as substring.

Together with 194723233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194723233) 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, 97361615 + 97361616.

It is an arithmetic number, because the mean of its divisors is an integer number (97361616).

Almost surely, 2^194723231 is an apocalyptic number.

194723231 is a deficient number, since it is larger than the sum of its proper divisors (1).

194723231 is an equidigital number, since it uses as much as digits as its factorization.

194723231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 194723231 is about 13954.3266050354. The cubic root of 194723231 is about 579.6145189267.

The spelling of 194723231 in words is "one hundred ninety-four million, seven hundred twenty-three thousand, two hundred thirty-one".