193944253 has 2 divisors, whose sum is σ = 193944254. Its totient is φ = 193944252.

The previous prime is 193944251. The next prime is 193944259. The reversal of 193944253 is 352449391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158684409 + 35259844 = 12597^2 + 5938^2 .

It is a cyclic number.

It is not a de Polignac number, because 193944253 - 2¹ = 193944251 is a prime.

It is a super-2 number, since 2×193944253² = 75228746543456018, which contains 22 as substring.

Together with 193944251, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193944251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96972126 + 96972127.

It is an arithmetic number, because the mean of its divisors is an integer number (96972127).

Almost surely, 2^193944253 is an apocalyptic number.

It is an amenable number.

193944253 is a deficient number, since it is larger than the sum of its proper divisors (1).

193944253 is an equidigital number, since it uses as much as digits as its factorization.

193944253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The square root of 193944253 is about 13926.3869327259. The cubic root of 193944253 is about 578.8405822079.

The spelling of 193944253 in words is "one hundred ninety-three million, nine hundred forty-four thousand, two hundred fifty-three".