53409329 has 4 divisors (see below), whose sum is σ = 55251060. Its totient is φ = 51567600.

The previous prime is 53409277. The next prime is 53409353. The reversal of 53409329 is 92390435.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8880400 + 44528929 = 2980^2 + 6673^2 .

It is a cyclic number.

It is not a de Polignac number, because 53409329 - 2¹⁶ = 53343793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53409029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920822 + ... + 920879.

It is an arithmetic number, because the mean of its divisors is an integer number (13812765).

Almost surely, 2^53409329 is an apocalyptic number.

It is an amenable number.

53409329 is a deficient number, since it is larger than the sum of its proper divisors (1841731).

53409329 is a wasteful number, since it uses less digits than its factorization.

53409329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841730.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 53409329 is about 7308.1686488477. The cubic root of 53409329 is about 376.5931133517.

The spelling of 53409329 in words is "fifty-three million, four hundred nine thousand, three hundred twenty-nine".