247941961 has 2 divisors, whose sum is σ = 247941962. Its totient is φ = 247941960.

The previous prime is 247941943. The next prime is 247941979. The reversal of 247941961 is 169149742.

It is a balanced prime because it is at equal distance from previous prime (247941943) and next prime (247941979).

It can be written as a sum of positive squares in only one way, i.e., 239785225 + 8156736 = 15485^2 + 2856^2 .

It is a cyclic number.

It is not a de Polignac number, because 247941961 - 2⁵ = 247941929 is a prime.

It is a super-2 number, since 2×247941961² = 122950432049051042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247941931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123970980 + 123970981.

It is an arithmetic number, because the mean of its divisors is an integer number (123970981).

Almost surely, 2^247941961 is an apocalyptic number.

It is an amenable number.

247941961 is a deficient number, since it is larger than the sum of its proper divisors (1).

247941961 is an equidigital number, since it uses as much as digits as its factorization.

247941961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 247941961 is about 15746.1729001050. The cubic root of 247941961 is about 628.2271152050.

The spelling of 247941961 in words is "two hundred forty-seven million, nine hundred forty-one thousand, nine hundred sixty-one".