78006443 has 4 divisors (see below), whose sum is σ = 78284328. Its totient is φ = 77728560.

The previous prime is 78006431. The next prime is 78006451. The reversal of 78006443 is 34460087.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34460087 = 157 ⋅219491.

It is a cyclic number.

It is not a de Polignac number, because 78006443 - 2¹⁰ = 78005419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78006473) 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, 138521 + ... + 139082.

It is an arithmetic number, because the mean of its divisors is an integer number (19571082).

Almost surely, 2^78006443 is an apocalyptic number.

78006443 is a deficient number, since it is larger than the sum of its proper divisors (277885).

78006443 is a wasteful number, since it uses less digits than its factorization.

78006443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277884.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 78006443 is about 8832.1256218421. The cubic root of 78006443 is about 427.2776322646.

The spelling of 78006443 in words is "seventy-eight million, six thousand, four hundred forty-three".