54259987 has 2 divisors, whose sum is σ = 54259988.
Its totient is φ = 54259986.
The previous prime is 54259981. The next prime is 54260027. The reversal of 54259987 is 78995245.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 54259987 - 219 = 53735699 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 54259987.
It is not a weakly prime, because it can be changed into another prime (54259981) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27129993 + 27129994.
It is an arithmetic number, because the mean of its divisors is an integer number (27129994).
Almost surely, 254259987 is an apocalyptic number.
54259987 is a deficient number, since it is larger than the sum of its proper divisors (1).
54259987 is an equidigital number, since it uses as much as digits as its factorization.
54259987 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 907200, while the sum is 49.
The square root of 54259987 is about 7366.1378618649.
The cubic root of 54259987 is about 378.5819423821.
The spelling of 54259987 in words is "fifty-four million, two hundred fifty-nine thousand, nine hundred eighty-seven".