247473893 has 2 divisors, whose sum is σ = 247473894. Its totient is φ = 247473892.

The previous prime is 247473857. The next prime is 247473911. The reversal of 247473893 is 398374742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171138724 + 76335169 = 13082^2 + 8737^2 .

It is a cyclic number.

It is not a de Polignac number, because 247473893 - 2⁶ = 247473829 is a prime.

It is a super-2 number, since 2×247473893² = 122486655433150898, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247473823) 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, 123736946 + 123736947.

It is an arithmetic number, because the mean of its divisors is an integer number (123736947).

Almost surely, 2^247473893 is an apocalyptic number.

It is an amenable number.

247473893 is a deficient number, since it is larger than the sum of its proper divisors (1).

247473893 is an equidigital number, since it uses as much as digits as its factorization.

247473893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 47.

The square root of 247473893 is about 15731.3029657432. The cubic root of 247473893 is about 627.8315411206.

It can be divided in two parts, 2474 and 73893, that added together give a palindrome (76367).

The spelling of 247473893 in words is "two hundred forty-seven million, four hundred seventy-three thousand, eight hundred ninety-three".