78897 has 24 divisors (see below), whose sum is σ = 137536. Its totient is φ = 39168.

The previous prime is 78893. The next prime is 78901. The reversal of 78897 is 79887.

78897 is nontrivially palindromic in base 16.

It is an interprime number because it is at equal distance from previous prime (78893) and next prime (78901).

It is not a de Polignac number, because 78897 - 2² = 78893 is a prime.

It is a super-3 number, since 3×78897³ = 1473339132720819, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (78893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4633 + ... + 4649.

2⁷⁸⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

78897 is a deficient number, since it is larger than the sum of its proper divisors (58639).

78897 is a wasteful number, since it uses less digits than its factorization.

78897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57 (or 40 counting only the distinct ones).

The product of its digits is 28224, while the sum is 39.

The square root of 78897 is about 280.8860979116. The cubic root of 78897 is about 42.8897482037.

Subtracting 78897 from its reverse (79887), we obtain a triangular number (990 = T₄₄).

The spelling of 78897 in words is "seventy-eight thousand, eight hundred ninety-seven".