247740223 has 2 divisors, whose sum is σ = 247740224. Its totient is φ = 247740222.

The previous prime is 247740217. The next prime is 247740239. The reversal of 247740223 is 322047742.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 247740223 - 2¹⁷ = 247609151 is a prime.

It is a super-2 number, since 2×247740223² = 122750436184179458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247740253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123870111 + 123870112.

It is an arithmetic number, because the mean of its divisors is an integer number (123870112).

Almost surely, 2^247740223 is an apocalyptic number.

247740223 is a deficient number, since it is larger than the sum of its proper divisors (1).

247740223 is an equidigital number, since it uses as much as digits as its factorization.

247740223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 247740223 is about 15739.7656589925. The cubic root of 247740223 is about 628.0566832888.

Adding to 247740223 its reverse (322047742), we get a palindrome (569787965).

The spelling of 247740223 in words is "two hundred forty-seven million, seven hundred forty thousand, two hundred twenty-three".