53548709 has 4 divisors (see below), whose sum is σ = 54559116. Its totient is φ = 52538304.

The previous prime is 53548699. The next prime is 53548723. The reversal of 53548709 is 90784535.

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 34869025 + 18679684 = 5905^2 + 4322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53548709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53548769) 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, 505124 + ... + 505229.

It is an arithmetic number, because the mean of its divisors is an integer number (13639779).

Almost surely, 2^53548709 is an apocalyptic number.

It is an amenable number.

53548709 is a deficient number, since it is larger than the sum of its proper divisors (1010407).

53548709 is a wasteful number, since it uses less digits than its factorization.

53548709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010406.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 53548709 is about 7317.6983403253. The cubic root of 53548709 is about 376.9204216785.

The spelling of 53548709 in words is "fifty-three million, five hundred forty-eight thousand, seven hundred nine".