247782961 has 2 divisors, whose sum is σ = 247782962. Its totient is φ = 247782960.

The previous prime is 247782943. The next prime is 247783021. The reversal of 247782961 is 169287742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167573025 + 80209936 = 12945^2 + 8956^2 .

It is a cyclic number.

It is not a de Polignac number, because 247782961 - 2¹¹ = 247780913 is a prime.

It is a super-2 number, since 2×247782961² = 122792791523855042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247782901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123891480 + 123891481.

It is an arithmetic number, because the mean of its divisors is an integer number (123891481).

Almost surely, 2^247782961 is an apocalyptic number.

It is an amenable number.

247782961 is a deficient number, since it is larger than the sum of its proper divisors (1).

247782961 is an equidigital number, since it uses as much as digits as its factorization.

247782961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 46.

The square root of 247782961 is about 15741.1232445464. The cubic root of 247782961 is about 628.0927968474.

The spelling of 247782961 in words is "two hundred forty-seven million, seven hundred eighty-two thousand, nine hundred sixty-one".