53723409 has 8 divisors (see below), whose sum is σ = 71947680. Its totient is φ = 35657376.

The previous prime is 53723387. The next prime is 53723419. The reversal of 53723409 is 90432735.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53723409 - 2⁹ = 53722897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53723409.

It is not an unprimeable number, because it can be changed into a prime (53723419) 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 7 ways as a sum of consecutive naturals, for example, 38764 + ... + 40125.

It is an arithmetic number, because the mean of its divisors is an integer number (8993460).

Almost surely, 2^53723409 is an apocalyptic number.

It is an amenable number.

53723409 is a deficient number, since it is larger than the sum of its proper divisors (18224271).

53723409 is a wasteful number, since it uses less digits than its factorization.

53723409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79119.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 53723409 is about 7329.6254338131. The cubic root of 53723409 is about 377.3298714411.

The spelling of 53723409 in words is "fifty-three million, seven hundred twenty-three thousand, four hundred nine".