193978423 has 2 divisors, whose sum is σ = 193978424. Its totient is φ = 193978422.

The previous prime is 193978409. The next prime is 193978451. The reversal of 193978423 is 324879391.

It is a weak prime.

It is an emirp because it is prime and its reverse (324879391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 193978423 - 2⁹ = 193977911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193978453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96989211 + 96989212.

It is an arithmetic number, because the mean of its divisors is an integer number (96989212).

Almost surely, 2^193978423 is an apocalyptic number.

193978423 is a deficient number, since it is larger than the sum of its proper divisors (1).

193978423 is an equidigital number, since it uses as much as digits as its factorization.

193978423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 193978423 is about 13927.6136864863. The cubic root of 193978423 is about 578.8745744865.

The spelling of 193978423 in words is "one hundred ninety-three million, nine hundred seventy-eight thousand, four hundred twenty-three".