53778469 has 2 divisors, whose sum is σ = 53778470. Its totient is φ = 53778468.

The previous prime is 53778467. The next prime is 53778523. The reversal of 53778469 is 96487735.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45292900 + 8485569 = 6730^2 + 2913^2 .

It is a cyclic number.

It is not a de Polignac number, because 53778469 - 2¹ = 53778467 is a prime.

It is a super-2 number, since 2×53778469² = 5784247455967922, which contains 22 as substring.

Together with 53778467, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53778467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26889234 + 26889235.

It is an arithmetic number, because the mean of its divisors is an integer number (26889235).

Almost surely, 2^53778469 is an apocalyptic number.

It is an amenable number.

53778469 is a deficient number, since it is larger than the sum of its proper divisors (1).

53778469 is an equidigital number, since it uses as much as digits as its factorization.

53778469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The square root of 53778469 is about 7333.3804619698. The cubic root of 53778469 is about 377.4587332637.

The spelling of 53778469 in words is "fifty-three million, seven hundred seventy-eight thousand, four hundred sixty-nine".