247572000209 has 2 divisors, whose sum is σ = 247572000210. Its totient is φ = 247572000208.

The previous prime is 247572000133. The next prime is 247572000239. The reversal of 247572000209 is 902000275742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 247360006609 + 211993600 = 497353^2 + 14560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247572000209 is a prime.

It is a super-2 number, since 2×247572000209² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247572000239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123786000104 + 123786000105.

It is an arithmetic number, because the mean of its divisors is an integer number (123786000105).

Almost surely, 2^247572000209 is an apocalyptic number.

It is an amenable number.

247572000209 is a deficient number, since it is larger than the sum of its proper divisors (1).

247572000209 is an equidigital number, since it uses as much as digits as its factorization.

247572000209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 247572000209 in words is "two hundred forty-seven billion, five hundred seventy-two million, two hundred nine", and thus it is an aban number.