247263253 has 2 divisors, whose sum is σ = 247263254. Its totient is φ = 247263252.

The previous prime is 247263229. The next prime is 247263257. The reversal of 247263253 is 352362742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209033764 + 38229489 = 14458^2 + 6183^2 .

It is a cyclic number.

It is not a de Polignac number, because 247263253 - 2⁵ = 247263221 is a prime.

It is a super-3 number, since 3×247263253³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247263257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123631626 + 123631627.

It is an arithmetic number, because the mean of its divisors is an integer number (123631627).

Almost surely, 2^247263253 is an apocalyptic number.

It is an amenable number.

247263253 is a deficient number, since it is larger than the sum of its proper divisors (1).

247263253 is an equidigital number, since it uses as much as digits as its factorization.

247263253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 34.

The square root of 247263253 is about 15724.6066087518. The cubic root of 247263253 is about 627.6533620907.

The spelling of 247263253 in words is "two hundred forty-seven million, two hundred sixty-three thousand, two hundred fifty-three".