78806023 has 4 divisors (see below), whose sum is σ = 78856848. Its totient is φ = 78755200.

The previous prime is 78806011. The next prime is 78806047. The reversal of 78806023 is 32060887.

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: 32060887 = 1283 ⋅24989.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78806023 is a prime.

It is a super-2 number, since 2×78806023² = 12420778522153058, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78806023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78806323) 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, 23011 + ... + 26212.

It is an arithmetic number, because the mean of its divisors is an integer number (19714212).

Almost surely, 2^78806023 is an apocalyptic number.

78806023 is a deficient number, since it is larger than the sum of its proper divisors (50825).

78806023 is a wasteful number, since it uses less digits than its factorization.

78806023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50824.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 78806023 is about 8877.2756519103. The cubic root of 78806023 is about 428.7325631602.

The spelling of 78806023 in words is "seventy-eight million, eight hundred six thousand, twenty-three".