247424161 has 2 divisors, whose sum is σ = 247424162. Its totient is φ = 247424160.

The previous prime is 247424147. The next prime is 247424173. The reversal of 247424161 is 161424742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221861025 + 25563136 = 14895^2 + 5056^2 .

It is a cyclic number.

It is not a de Polignac number, because 247424161 - 2¹⁵ = 247391393 is a prime.

It is a super-2 number, since 2×247424161² = 122437430893107842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247428161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123712080 + 123712081.

It is an arithmetic number, because the mean of its divisors is an integer number (123712081).

Almost surely, 2^247424161 is an apocalyptic number.

It is an amenable number.

247424161 is a deficient number, since it is larger than the sum of its proper divisors (1).

247424161 is an equidigital number, since it uses as much as digits as its factorization.

247424161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 31.

The square root of 247424161 is about 15729.7222162376. The cubic root of 247424161 is about 627.7894822599.

The spelling of 247424161 in words is "two hundred forty-seven million, four hundred twenty-four thousand, one hundred sixty-one".