53333809 has 9 divisors (see below), whose sum is σ = 54642987. Its totient is φ = 52055784.

The previous prime is 53333789. The next prime is 53333821. The reversal of 53333809 is 90833335.

The square root of 53333809 is 7303.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 37173409 + 16160400 = 6097^2 + 4020^2 .

It is not a de Polignac number, because 53333809 - 2¹⁵ = 53301041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53331809) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 489247 + ... + 489355.

It is an arithmetic number, because the mean of its divisors is an integer number (6071443).

Almost surely, 2^53333809 is an apocalyptic number.

53333809 is the 7303-rd square number.

53333809 is the 3652-nd centered octagonal number.

It is an amenable number.

53333809 is a deficient number, since it is larger than the sum of its proper divisors (1309178).

53333809 is an frugal number, since it uses more digits than its factorization.

53333809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 34.

The cubic root of 53333809 is about 376.4155305978.

The spelling of 53333809 in words is "fifty-three million, three hundred thirty-three thousand, eight hundred nine".