53865953 has 4 divisors (see below), whose sum is σ = 53887380. Its totient is φ = 53844528.

The previous prime is 53865919. The next prime is 53865961. The reversal of 53865953 is 35956835.

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 31888609 + 21977344 = 5647^2 + 4688^2 .

It is a cyclic number.

It is not a de Polignac number, because 53865953 - 2¹⁰ = 53864929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53865983) 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, 6350 + ... + 12167.

It is an arithmetic number, because the mean of its divisors is an integer number (13471845).

Almost surely, 2^53865953 is an apocalyptic number.

It is an amenable number.

53865953 is a deficient number, since it is larger than the sum of its proper divisors (21427).

53865953 is a wasteful number, since it uses less digits than its factorization.

53865953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21426.

The product of its digits is 486000, while the sum is 44.

The square root of 53865953 is about 7339.3428179913. The cubic root of 53865953 is about 377.6632990851.

The spelling of 53865953 in words is "fifty-three million, eight hundred sixty-five thousand, nine hundred fifty-three".