53453209 has 2 divisors, whose sum is σ = 53453210. Its totient is φ = 53453208.

The previous prime is 53453149. The next prime is 53453227. The reversal of 53453209 is 90235435.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40921609 + 12531600 = 6397^2 + 3540^2 .

It is a cyclic number.

It is not a de Polignac number, because 53453209 - 2⁹ = 53452697 is a prime.

It is not a weakly prime, because it can be changed into another prime (53453509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26726604 + 26726605.

It is an arithmetic number, because the mean of its divisors is an integer number (26726605).

Almost surely, 2^53453209 is an apocalyptic number.

It is an amenable number.

53453209 is a deficient number, since it is larger than the sum of its proper divisors (1).

53453209 is an equidigital number, since it uses as much as digits as its factorization.

53453209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 53453209 is about 7311.1701525816. The cubic root of 53453209 is about 376.6962188246.

The spelling of 53453209 in words is "fifty-three million, four hundred fifty-three thousand, two hundred nine".