193742491 has 2 divisors, whose sum is σ = 193742492. Its totient is φ = 193742490.

The previous prime is 193742453. The next prime is 193742531. The reversal of 193742491 is 194247391.

193742491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (193742531) can be obtained adding 193742491 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 193742491 - 2¹⁵ = 193709723 is a prime.

It is not a weakly prime, because it can be changed into another prime (193742191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96871245 + 96871246.

It is an arithmetic number, because the mean of its divisors is an integer number (96871246).

Almost surely, 2^193742491 is an apocalyptic number.

193742491 is a deficient number, since it is larger than the sum of its proper divisors (1).

193742491 is an equidigital number, since it uses as much as digits as its factorization.

193742491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 193742491 is about 13919.1411732190. The cubic root of 193742491 is about 578.6397881589.

The spelling of 193742491 in words is "one hundred ninety-three million, seven hundred forty-two thousand, four hundred ninety-one".