53453509 has 2 divisors, whose sum is σ = 53453510. Its totient is φ = 53453508.

The previous prime is 53453497. The next prime is 53453513. The reversal of 53453509 is 90535435.

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., 33005025 + 20448484 = 5745^2 + 4522^2 .

It is a cyclic number.

It is not a de Polignac number, because 53453509 - 2¹⁹ = 52929221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53453539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26726754 + 26726755.

It is an arithmetic number, because the mean of its divisors is an integer number (26726755).

Almost surely, 2^53453509 is an apocalyptic number.

It is an amenable number.

53453509 is a deficient number, since it is larger than the sum of its proper divisors (1).

53453509 is an equidigital number, since it uses as much as digits as its factorization.

53453509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40500, while the sum is 34.

The square root of 53453509 is about 7311.1906691045. The cubic root of 53453509 is about 376.6969235447.

The spelling of 53453509 in words is "fifty-three million, four hundred fifty-three thousand, five hundred nine".