78443023 has 4 divisors (see below), whose sum is σ = 78460768. Its totient is φ = 78425280.

The previous prime is 78443003. The next prime is 78443059. The reversal of 78443023 is 32034487.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 32034487 = 2153 ⋅14879.

It is a cyclic number.

It is not a de Polignac number, because 78443023 - 2¹⁷ = 78311951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78443003) 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, 3658 + ... + 13048.

It is an arithmetic number, because the mean of its divisors is an integer number (19615192).

Almost surely, 2^78443023 is an apocalyptic number.

78443023 is a deficient number, since it is larger than the sum of its proper divisors (17745).

78443023 is an equidigital number, since it uses as much as digits as its factorization.

78443023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17744.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 78443023 is about 8856.8065915430. The cubic root of 78443023 is about 428.0732671467.

The spelling of 78443023 in words is "seventy-eight million, four hundred forty-three thousand, twenty-three".