53009329 has 2 divisors, whose sum is σ = 53009330. Its totient is φ = 53009328.

The previous prime is 53009311. The next prime is 53009339. The reversal of 53009329 is 92390035.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42928704 + 10080625 = 6552^2 + 3175^2 .

It is a cyclic number.

It is not a de Polignac number, because 53009329 - 2¹⁷ = 52878257 is a prime.

It is a super-4 number, since 4×53009329⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53009329.

It is not a weakly prime, because it can be changed into another prime (53009309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26504664 + 26504665.

It is an arithmetic number, because the mean of its divisors is an integer number (26504665).

Almost surely, 2^53009329 is an apocalyptic number.

It is an amenable number.

53009329 is a deficient number, since it is larger than the sum of its proper divisors (1).

53009329 is an equidigital number, since it uses as much as digits as its factorization.

53009329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 53009329 is about 7280.7505794389. The cubic root of 53009329 is about 375.6506133680.

The spelling of 53009329 in words is "fifty-three million, nine thousand, three hundred twenty-nine".