247216337 has 2 divisors, whose sum is σ = 247216338. Its totient is φ = 247216336.

The previous prime is 247216309. The next prime is 247216339. The reversal of 247216337 is 733612742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155650576 + 91565761 = 12476^2 + 9569^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247216337 is a prime.

It is a super-2 number, since 2×247216337² = 122231834559395138, which contains 22 as substring.

Together with 247216339, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 247216297 and 247216306.

It is not a weakly prime, because it can be changed into another prime (247216339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123608168 + 123608169.

It is an arithmetic number, because the mean of its divisors is an integer number (123608169).

Almost surely, 2^247216337 is an apocalyptic number.

It is an amenable number.

247216337 is a deficient number, since it is larger than the sum of its proper divisors (1).

247216337 is an equidigital number, since it uses as much as digits as its factorization.

247216337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 35.

The square root of 247216337 is about 15723.1147359548. The cubic root of 247216337 is about 627.6136623679.

The spelling of 247216337 in words is "two hundred forty-seven million, two hundred sixteen thousand, three hundred thirty-seven".