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BaseRepresentation
bin10011010000100111
311000012202
4103100213
510011022
61405115
7445664
oct232047
9130182
1078887
11542a6
123979b
1329ba3
1420a6b
1518592
hex13427

78887 has 2 divisors, whose sum is σ = 78888. Its totient is φ = 78886.

The previous prime is 78877. The next prime is 78889.

78887 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 78887 - 26 = 78823 is a prime.

Together with 78889, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39443 + 39444.

It is an arithmetic number, because the mean of its divisors is an integer number (39444).

278887 is an apocalyptic number.

78887 is a deficient number, since it is larger than the sum of its proper divisors (1).

78887 is an equidigital number, since it uses as much as digits as its factorization.

78887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088, while the sum is 38.

The square root of 78887 is about 280.8682965377. The cubic root of 78887 is about 42.8879360706.

The spelling of 78887 in words is "seventy-eight thousand, eight hundred eighty-seven".