53987 has 2 divisors, whose sum is σ = 53988. Its totient is φ = 53986.

The previous prime is 53959. The next prime is 53993. The reversal of 53987 is 78935.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53987 - 2⁶ = 53923 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 53987.

It is not a weakly prime, because it can be changed into another prime (53917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26993 + 26994.

It is an arithmetic number, because the mean of its divisors is an integer number (26994).

2⁵³⁹⁸⁷ is an apocalyptic number.

53987 is a deficient number, since it is larger than the sum of its proper divisors (1).

53987 is an equidigital number, since it uses as much as digits as its factorization.

53987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 53987 is about 232.3510275424. The cubic root of 53987 is about 37.7945981101.

It can be divided in two parts, 539 and 87, that added together give a palindrome (626).

The spelling of 53987 in words is "fifty-three thousand, nine hundred eighty-seven".