53443609 has 2 divisors, whose sum is σ = 53443610. Its totient is φ = 53443608.

The previous prime is 53443601. The next prime is 53443613. The reversal of 53443609 is 90634435.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47817225 + 5626384 = 6915^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 53443609 - 2³ = 53443601 is a prime.

It is not a weakly prime, because it can be changed into another prime (53443601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26721804 + 26721805.

It is an arithmetic number, because the mean of its divisors is an integer number (26721805).

Almost surely, 2^53443609 is an apocalyptic number.

It is an amenable number.

53443609 is a deficient number, since it is larger than the sum of its proper divisors (1).

53443609 is an equidigital number, since it uses as much as digits as its factorization.

53443609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 53443609 is about 7310.5135934488. The cubic root of 53443609 is about 376.6736663887.

The spelling of 53443609 in words is "fifty-three million, four hundred forty-three thousand, six hundred nine".