247340761 has 2 divisors, whose sum is σ = 247340762. Its totient is φ = 247340760.

The previous prime is 247340749. The next prime is 247340777. The reversal of 247340761 is 167043742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201100761 + 46240000 = 14181^2 + 6800^2 .

It is a cyclic number.

It is not a de Polignac number, because 247340761 - 2¹⁷ = 247209689 is a prime.

It is a super-2 number, since 2×247340761² = 122354904104118242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247340711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123670380 + 123670381.

It is an arithmetic number, because the mean of its divisors is an integer number (123670381).

Almost surely, 2^247340761 is an apocalyptic number.

It is an amenable number.

247340761 is a deficient number, since it is larger than the sum of its proper divisors (1).

247340761 is an equidigital number, since it uses as much as digits as its factorization.

247340761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 247340761 is about 15727.0709606080. The cubic root of 247340761 is about 627.7189373752.

It can be divided in two parts, 2473 and 40761, that added together give a palindrome (43234).

The spelling of 247340761 in words is "two hundred forty-seven million, three hundred forty thousand, seven hundred sixty-one".