247080761 has 2 divisors, whose sum is σ = 247080762. Its totient is φ = 247080760.

The previous prime is 247080751. The next prime is 247080767. The reversal of 247080761 is 167080742.

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., 149940025 + 97140736 = 12245^2 + 9856^2 .

It is a cyclic number.

It is not a de Polignac number, because 247080761 - 2¹⁸ = 246818617 is a prime.

It is a super-2 number, since 2×247080761² = 122097804912678242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (247080767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123540380 + 123540381.

It is an arithmetic number, because the mean of its divisors is an integer number (123540381).

Almost surely, 2^247080761 is an apocalyptic number.

It is an amenable number.

247080761 is a deficient number, since it is larger than the sum of its proper divisors (1).

247080761 is an equidigital number, since it uses as much as digits as its factorization.

247080761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 247080761 is about 15718.8027851996. The cubic root of 247080761 is about 627.4989114440.

The spelling of 247080761 in words is "two hundred forty-seven million, eighty thousand, seven hundred sixty-one".