194431823 has 2 divisors, whose sum is σ = 194431824. Its totient is φ = 194431822.

The previous prime is 194431819. The next prime is 194431837. The reversal of 194431823 is 328134491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 194431823 - 2² = 194431819 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194430823) 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, 97215911 + 97215912.

It is an arithmetic number, because the mean of its divisors is an integer number (97215912).

Almost surely, 2^194431823 is an apocalyptic number.

194431823 is a deficient number, since it is larger than the sum of its proper divisors (1).

194431823 is an equidigital number, since it uses as much as digits as its factorization.

194431823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 194431823 is about 13943.8812028789. The cubic root of 194431823 is about 579.3252388830.

The spelling of 194431823 in words is "one hundred ninety-four million, four hundred thirty-one thousand, eight hundred twenty-three".