247122961 has 2 divisors, whose sum is σ = 247122962. Its totient is φ = 247122960.

The previous prime is 247122943. The next prime is 247122973. The reversal of 247122961 is 169221742.

247122961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125440000 + 121682961 = 11200^2 + 11031^2 .

It is a cyclic number.

It is not a de Polignac number, because 247122961 - 2²⁵ = 213568529 is a prime.

It is a super-2 number, since 2×247122961² = 122139515706815042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247122991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123561480 + 123561481.

It is an arithmetic number, because the mean of its divisors is an integer number (123561481).

Almost surely, 2^247122961 is an apocalyptic number.

It is an amenable number.

247122961 is a deficient number, since it is larger than the sum of its proper divisors (1).

247122961 is an equidigital number, since it uses as much as digits as its factorization.

247122961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 247122961 is about 15720.1450693052. The cubic root of 247122961 is about 627.5346338349.

The spelling of 247122961 in words is "two hundred forty-seven million, one hundred twenty-two thousand, nine hundred sixty-one".