193897243 has 2 divisors, whose sum is σ = 193897244. Its totient is φ = 193897242.

The previous prime is 193897229. The next prime is 193897247. The reversal of 193897243 is 342798391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 193897243 - 2⁵ = 193897211 is a prime.

It is a super-2 number, since 2×193897243² = 75192281686002098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 193897193 and 193897202.

It is not a weakly prime, because it can be changed into another prime (193897247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96948621 + 96948622.

It is an arithmetic number, because the mean of its divisors is an integer number (96948622).

Almost surely, 2^193897243 is an apocalyptic number.

193897243 is a deficient number, since it is larger than the sum of its proper divisors (1).

193897243 is an equidigital number, since it uses as much as digits as its factorization.

193897243 is an odious number, because the sum of its binary digits is odd.

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

The square root of 193897243 is about 13924.6990272681. The cubic root of 193897243 is about 578.7938101858.

The spelling of 193897243 in words is "one hundred ninety-three million, eight hundred ninety-seven thousand, two hundred forty-three".