247122913 has 2 divisors, whose sum is σ = 247122914. Its totient is φ = 247122912.

The previous prime is 247122899. The next prime is 247122919. The reversal of 247122913 is 319221742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191351889 + 55771024 = 13833^2 + 7468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247122913 is a prime.

It is a super-2 number, since 2×247122913² = 122139468259211138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247122919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123561456 + 123561457.

It is an arithmetic number, because the mean of its divisors is an integer number (123561457).

Almost surely, 2^247122913 is an apocalyptic number.

It is an amenable number.

247122913 is a deficient number, since it is larger than the sum of its proper divisors (1).

247122913 is an equidigital number, since it uses as much as digits as its factorization.

247122913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 247122913 is about 15720.1435426016. The cubic root of 247122913 is about 627.5345932051.

The spelling of 247122913 in words is "two hundred forty-seven million, one hundred twenty-two thousand, nine hundred thirteen".