247722073 has 2 divisors, whose sum is σ = 247722074. Its totient is φ = 247722072.

The previous prime is 247722071. The next prime is 247722127. The reversal of 247722073 is 370227742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226442304 + 21279769 = 15048^2 + 4613^2 .

It is a cyclic number.

It is not a de Polignac number, because 247722073 - 2¹ = 247722071 is a prime.

It is a super-2 number, since 2×247722073² = 122732450902834658, which contains 22 as substring.

Together with 247722071, it forms a pair of twin primes.

It is equal to p_13561396 and since 247722073 and 13561396 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (247722071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123861036 + 123861037.

It is an arithmetic number, because the mean of its divisors is an integer number (123861037).

Almost surely, 2^247722073 is an apocalyptic number.

It is an amenable number.

247722073 is a deficient number, since it is larger than the sum of its proper divisors (1).

247722073 is an equidigital number, since it uses as much as digits as its factorization.

247722073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32928, while the sum is 34.

The square root of 247722073 is about 15739.1890833041. The cubic root of 247722073 is about 628.0413453042.

The spelling of 247722073 in words is "two hundred forty-seven million, seven hundred twenty-two thousand, seventy-three".