53945 has 4 divisors (see below), whose sum is σ = 64740. Its totient is φ = 43152.

The previous prime is 53939. The next prime is 53951. The reversal of 53945 is 54935.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54935 = 5 ⋅10987.

It is an interprime number because it is at equal distance from previous prime (53939) and next prime (53951).

It can be written as a sum of positive squares in 2 ways, for example, as 21904 + 32041 = 148^2 + 179^2 .

It is a cyclic number.

It is not a de Polignac number, because 53945 - 2⁶ = 53881 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5390 + ... + 5399.

It is an arithmetic number, because the mean of its divisors is an integer number (16185).

2⁵³⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

53945 is a deficient number, since it is larger than the sum of its proper divisors (10795).

53945 is a wasteful number, since it uses less digits than its factorization.

53945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10794.

The product of its digits is 2700, while the sum is 26.

The square root of 53945 is about 232.2606294661. The cubic root of 53945 is about 37.7847946084.

Subtracting 53945 from its reverse (54935), we obtain a triangular number (990 = T₄₄).

The spelling of 53945 in words is "fifty-three thousand, nine hundred forty-five".