78473 has 4 divisors (see below), whose sum is σ = 79380. Its totient is φ = 77568.

The previous prime is 78467. The next prime is 78479. The reversal of 78473 is 37487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37487 = 19 ⋅1973.

It is an interprime number because it is at equal distance from previous prime (78467) and next prime (78479).

It can be written as a sum of positive squares in 2 ways, for example, as 53824 + 24649 = 232^2 + 157^2 .

It is a cyclic number.

It is not a de Polignac number, because 78473 - 2¹² = 74377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78479) 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 3 ways as a sum of consecutive naturals, for example, 308 + ... + 501.

It is an arithmetic number, because the mean of its divisors is an integer number (19845).

2⁷⁸⁴⁷³ is an apocalyptic number.

It is an amenable number.

78473 is a deficient number, since it is larger than the sum of its proper divisors (907).

78473 is an equidigital number, since it uses as much as digits as its factorization.

78473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906.

The product of its digits is 4704, while the sum is 29.

The square root of 78473 is about 280.1303268124. The cubic root of 78473 is about 42.8127789599.

The spelling of 78473 in words is "seventy-eight thousand, four hundred seventy-three".