78487 has 2 divisors, whose sum is σ = 78488. Its totient is φ = 78486.
The previous prime is 78479. The next prime is 78497.
78487 is nontrivially palindromic in base 10.
It is a weak prime.
It is a palprime.
It is a cyclic number.
It is not a de Polignac number, because 78487 - 23 = 78479 is a prime.
78487 is a lucky number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (78427) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39243 + 39244.
It is an arithmetic number, because the mean of its divisors is an integer number (39244).
278487 is an apocalyptic number.
78487 is a deficient number, since it is larger than the sum of its proper divisors (1).
78487 is an equidigital number, since it uses as much as digits as its factorization.
78487 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 12544, while the sum is 34.
The square root of 78487 is about 280.1553140670. The cubic root of 78487 is about 42.8153248176.
It can be divided in two parts, 78 and 487, that added together give a palindrome (565).
The spelling of 78487 in words is "seventy-eight thousand, four hundred eighty-seven".
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