318241247 has 2 divisors, whose sum is σ = 318241248. Its totient is φ = 318241246.

The previous prime is 318241243. The next prime is 318241249. The reversal of 318241247 is 742142813.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 318241247 - 2² = 318241243 is a prime.

Together with 318241249, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_17185631 and since 318241247 and 17185631 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318241243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159120623 + 159120624.

It is an arithmetic number, because the mean of its divisors is an integer number (159120624).

Almost surely, 2^318241247 is an apocalyptic number.

318241247 is a deficient number, since it is larger than the sum of its proper divisors (1).

318241247 is an equidigital number, since it uses as much as digits as its factorization.

318241247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 32.

The square root of 318241247 is about 17839.3174477052. The cubic root of 318241247 is about 682.7349820382.

The spelling of 318241247 in words is "three hundred eighteen million, two hundred forty-one thousand, two hundred forty-seven".