247218701 has 2 divisors, whose sum is σ = 247218702. Its totient is φ = 247218700.

The previous prime is 247218691. The next prime is 247218703. The reversal of 247218701 is 107812742.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190578025 + 56640676 = 13805^2 + 7526^2 .

It is a cyclic number.

It is not a de Polignac number, because 247218701 - 2²⁶ = 180109837 is a prime.

It is a super-2 number, since 2×247218701² = 122234172248254802, which contains 22 as substring.

Together with 247218703, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247218703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123609350 + 123609351.

It is an arithmetic number, because the mean of its divisors is an integer number (123609351).

Almost surely, 2^247218701 is an apocalyptic number.

It is an amenable number.

247218701 is a deficient number, since it is larger than the sum of its proper divisors (1).

247218701 is an equidigital number, since it uses as much as digits as its factorization.

247218701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 247218701 is about 15723.1899117196. The cubic root of 247218701 is about 627.6156628748.

The spelling of 247218701 in words is "two hundred forty-seven million, two hundred eighteen thousand, seven hundred one".