53438369 has 2 divisors, whose sum is σ = 53438370. Its totient is φ = 53438368.

The previous prime is 53438351. The next prime is 53438377. The reversal of 53438369 is 96383435.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47128225 + 6310144 = 6865^2 + 2512^2 .

It is a cyclic number.

It is not a de Polignac number, because 53438369 - 2⁸ = 53438113 is a prime.

It is a super-2 number, since 2×53438369² = 5711318562760322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53438339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26719184 + 26719185.

It is an arithmetic number, because the mean of its divisors is an integer number (26719185).

Almost surely, 2^53438369 is an apocalyptic number.

It is an amenable number.

53438369 is a deficient number, since it is larger than the sum of its proper divisors (1).

53438369 is an equidigital number, since it uses as much as digits as its factorization.

53438369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 41.

The square root of 53438369 is about 7310.1551967109. The cubic root of 53438369 is about 376.6613553780.

The spelling of 53438369 in words is "fifty-three million, four hundred thirty-eight thousand, three hundred sixty-nine".