424947869 has 2 divisors, whose sum is σ = 424947870. Its totient is φ = 424947868.

The previous prime is 424947857. The next prime is 424947871. The reversal of 424947869 is 968749424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422508025 + 2439844 = 20555^2 + 1562^2 .

It is a cyclic number.

It is not a de Polignac number, because 424947869 - 2⁸ = 424947613 is a prime.

It is a super-2 number, since 2×424947869² = 361161382735282322, which contains 22 as substring.

Together with 424947871, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 424947869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424946869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212473934 + 212473935.

It is an arithmetic number, because the mean of its divisors is an integer number (212473935).

Almost surely, 2^424947869 is an apocalyptic number.

It is an amenable number.

424947869 is a deficient number, since it is larger than the sum of its proper divisors (1).

424947869 is an equidigital number, since it uses as much as digits as its factorization.

424947869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 53.

The square root of 424947869 is about 20614.2637268470. The cubic root of 424947869 is about 751.8165560208.

The spelling of 424947869 in words is "four hundred twenty-four million, nine hundred forty-seven thousand, eight hundred sixty-nine".