78733 has 4 divisors (see below), whose sum is σ = 80608. Its totient is φ = 76860.

The previous prime is 78721. The next prime is 78737. The reversal of 78733 is 33787.

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 a de Polignac number, because none of the positive numbers 2^k-78733 is a prime.

It is a Duffinian number.

78733 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78737) 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, 873 + ... + 958.

It is an arithmetic number, because the mean of its divisors is an integer number (20152).

2⁷⁸⁷³³ is an apocalyptic number.

It is an amenable number.

78733 is a deficient number, since it is larger than the sum of its proper divisors (1875).

78733 is a wasteful number, since it uses less digits than its factorization.

78733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874.

The product of its digits is 3528, while the sum is 28.

The square root of 78733 is about 280.5940127658. The cubic root of 78733 is about 42.8600098611.

It can be divided in two parts, 787 and 33, that added together give a triangular number (820 = T₄₀).

The spelling of 78733 in words is "seventy-eight thousand, seven hundred thirty-three".