193142893 has 2 divisors, whose sum is σ = 193142894. Its totient is φ = 193142892.

The previous prime is 193142839. The next prime is 193142903. The reversal of 193142893 is 398241391.

Together with previous prime (193142839) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108097609 + 85045284 = 10397^2 + 9222^2 .

It is an emirp because it is prime and its reverse (398241391) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-193142893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193142393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96571446 + 96571447.

It is an arithmetic number, because the mean of its divisors is an integer number (96571447).

Almost surely, 2^193142893 is an apocalyptic number.

It is an amenable number.

193142893 is a deficient number, since it is larger than the sum of its proper divisors (1).

193142893 is an equidigital number, since it uses as much as digits as its factorization.

193142893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 40.

The square root of 193142893 is about 13897.5858694955. The cubic root of 193142893 is about 578.0422427750.

The spelling of 193142893 in words is "one hundred ninety-three million, one hundred forty-two thousand, eight hundred ninety-three".