247480081 has 2 divisors, whose sum is σ = 247480082. Its totient is φ = 247480080.

The previous prime is 247480063. The next prime is 247480097. The reversal of 247480081 is 180084742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208542481 + 38937600 = 14441^2 + 6240^2 .

It is a cyclic number.

It is not a de Polignac number, because 247480081 - 2²³ = 239091473 is a prime.

It is a super-2 number, since 2×247480081² = 122492780983533122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247483081) 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, 123740040 + 123740041.

It is an arithmetic number, because the mean of its divisors is an integer number (123740041).

Almost surely, 2^247480081 is an apocalyptic number.

It is an amenable number.

247480081 is a deficient number, since it is larger than the sum of its proper divisors (1).

247480081 is an equidigital number, since it uses as much as digits as its factorization.

247480081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 247480081 is about 15731.4996424371. The cubic root of 247480081 is about 627.8367739812.

The spelling of 247480081 in words is "two hundred forty-seven million, four hundred eighty thousand, eighty-one".