78433123 has 4 divisors (see below), whose sum is σ = 80346168. Its totient is φ = 76520080.

The previous prime is 78433111. The next prime is 78433181. The reversal of 78433123 is 32133487.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78433123 - 2²¹ = 76335971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78433723) 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, 956461 + ... + 956542.

It is an arithmetic number, because the mean of its divisors is an integer number (20086542).

Almost surely, 2^78433123 is an apocalyptic number.

78433123 is a deficient number, since it is larger than the sum of its proper divisors (1913045).

78433123 is a wasteful number, since it uses less digits than its factorization.

78433123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913044.

The product of its digits is 12096, while the sum is 31.

The square root of 78433123 is about 8856.2476817216. The cubic root of 78433123 is about 428.0552578814.

The spelling of 78433123 in words is "seventy-eight million, four hundred thirty-three thousand, one hundred twenty-three".