53961 has 4 divisors (see below), whose sum is σ = 71952. Its totient is φ = 35972.

The previous prime is 53959. The next prime is 53987. The reversal of 53961 is 16935.

53961 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53961 - 2¹ = 53959 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53951) 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, 8991 + ... + 8996.

It is an arithmetic number, because the mean of its divisors is an integer number (17988).

2⁵³⁹⁶¹ is an apocalyptic number.

It is an amenable number.

53961 is a deficient number, since it is larger than the sum of its proper divisors (17991).

53961 is a wasteful number, since it uses less digits than its factorization.

53961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17990.

The product of its digits is 810, while the sum is 24.

The square root of 53961 is about 232.2950709765. The cubic root of 53961 is about 37.7885298756.

The spelling of 53961 in words is "fifty-three thousand, nine hundred sixty-one".