247440469 has 2 divisors, whose sum is σ = 247440470. Its totient is φ = 247440468.

The previous prime is 247440437. The next prime is 247440493. The reversal of 247440469 is 964044742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 247432900 + 7569 = 15730^2 + 87^2 .

It is a cyclic number.

It is not a de Polignac number, because 247440469 - 2⁵ = 247440437 is a prime.

It is a super-2 number, since 2×247440469² = 122453571397879922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247446469) 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, 123720234 + 123720235.

It is an arithmetic number, because the mean of its divisors is an integer number (123720235).

Almost surely, 2^247440469 is an apocalyptic number.

It is an amenable number.

247440469 is a deficient number, since it is larger than the sum of its proper divisors (1).

247440469 is an equidigital number, since it uses as much as digits as its factorization.

247440469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 247440469 is about 15730.2405893871. The cubic root of 247440469 is about 627.8032747231.

The spelling of 247440469 in words is "two hundred forty-seven million, four hundred forty thousand, four hundred sixty-nine".