247276481 has 2 divisors, whose sum is σ = 247276482. Its totient is φ = 247276480.

The previous prime is 247276409. The next prime is 247276501. The reversal of 247276481 is 184672742.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179131456 + 68145025 = 13384^2 + 8255^2 .

It is a cyclic number.

It is not a de Polignac number, because 247276481 - 2¹⁸ = 247014337 is a prime.

It is a super-2 number, since 2×247276481² = 122291316111486722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (247276681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123638240 + 123638241.

It is an arithmetic number, because the mean of its divisors is an integer number (123638241).

Almost surely, 2^247276481 is an apocalyptic number.

It is an amenable number.

247276481 is a deficient number, since it is larger than the sum of its proper divisors (1).

247276481 is an equidigital number, since it uses as much as digits as its factorization.

247276481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 41.

The square root of 247276481 is about 15725.0272177825. The cubic root of 247276481 is about 627.6645545485.

The spelling of 247276481 in words is "two hundred forty-seven million, two hundred seventy-six thousand, four hundred eighty-one".