53169409 has 4 divisors (see below), whose sum is σ = 53240404. Its totient is φ = 53098416.

The previous prime is 53169397. The next prime is 53169427. The reversal of 53169409 is 90496135.

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 40602384 + 12567025 = 6372^2 + 3545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53169409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53169469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34362 + ... + 35875.

It is an arithmetic number, because the mean of its divisors is an integer number (13310101).

Almost surely, 2^53169409 is an apocalyptic number.

It is an amenable number.

53169409 is a deficient number, since it is larger than the sum of its proper divisors (70995).

53169409 is an equidigital number, since it uses as much as digits as its factorization.

53169409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70994.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 53169409 is about 7291.7356644355. The cubic root of 53169409 is about 376.0283690116.

The spelling of 53169409 in words is "fifty-three million, one hundred sixty-nine thousand, four hundred nine".