247243193 has 2 divisors, whose sum is σ = 247243194. Its totient is φ = 247243192.

The previous prime is 247243159. The next prime is 247243207. The reversal of 247243193 is 391342742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238640704 + 8602489 = 15448^2 + 2933^2 .

It is a cyclic number.

It is not a de Polignac number, because 247243193 - 2⁸ = 247242937 is a prime.

It is a super-3 number, since 3×247243193³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (247243103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123621596 + 123621597.

It is an arithmetic number, because the mean of its divisors is an integer number (123621597).

Almost surely, 2^247243193 is an apocalyptic number.

It is an amenable number.

247243193 is a deficient number, since it is larger than the sum of its proper divisors (1).

247243193 is an equidigital number, since it uses as much as digits as its factorization.

247243193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 35.

The square root of 247243193 is about 15723.9687420193. The cubic root of 247243193 is about 627.6363881883.

The spelling of 247243193 in words is "two hundred forty-seven million, two hundred forty-three thousand, one hundred ninety-three".