78243353 has 4 divisors (see below), whose sum is σ = 79186128. Its totient is φ = 77300580.

The previous prime is 78243343. The next prime is 78243379. The reversal of 78243353 is 35334287.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35334287 = 97 ⋅364271.

It is a cyclic number.

It is not a de Polignac number, because 78243353 - 2²⁴ = 61466137 is a prime.

It is a super-2 number, since 2×78243353² = 12244044577365218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78243313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471263 + ... + 471428.

It is an arithmetic number, because the mean of its divisors is an integer number (19796532).

Almost surely, 2^78243353 is an apocalyptic number.

It is an amenable number.

78243353 is a deficient number, since it is larger than the sum of its proper divisors (942775).

78243353 is an equidigital number, since it uses as much as digits as its factorization.

78243353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942774.

The product of its digits is 60480, while the sum is 35.

The square root of 78243353 is about 8845.5272878444. The cubic root of 78243353 is about 427.7097505863.

The spelling of 78243353 in words is "seventy-eight million, two hundred forty-three thousand, three hundred fifty-three".