78297 has 4 divisors (see below), whose sum is σ = 104400. Its totient is φ = 52196.

The previous prime is 78283. The next prime is 78301. The reversal of 78297 is 79287.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78297 - 2⁶ = 78233 is a prime.

It is a super-3 number, since 3×78297³ = 1439980533312219, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a d-powerful number, because it can be written as 7⁴ + 8 + 2⁵ + 9⁵ + 7⁵ .

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (78277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13047 + ... + 13052.

It is an arithmetic number, because the mean of its divisors is an integer number (26100).

2⁷⁸²⁹⁷ is an apocalyptic number.

It is an amenable number.

78297 is a deficient number, since it is larger than the sum of its proper divisors (26103).

78297 is a wasteful number, since it uses less digits than its factorization.

78297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26102.

The product of its digits is 7056, while the sum is 33.

The square root of 78297 is about 279.8160109786. The cubic root of 78297 is about 42.7807480306.

Subtracting 78297 from its reverse (79287), we obtain a triangular number (990 = T₄₄).

The spelling of 78297 in words is "seventy-eight thousand, two hundred ninety-seven".