78808623 has 4 divisors (see below), whose sum is σ = 105078168. Its totient is φ = 52539080.

The previous prime is 78808621. The next prime is 78808627. The reversal of 78808623 is 32680887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32680887 = 3 ⋅10893629.

It is a cyclic number.

It is not a de Polignac number, because 78808623 - 2¹ = 78808621 is a prime.

It is a super-2 number, since 2×78808623² = 12421598118312258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78808621) 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, 13134768 + ... + 13134773.

It is an arithmetic number, because the mean of its divisors is an integer number (26269542).

Almost surely, 2^78808623 is an apocalyptic number.

78808623 is a deficient number, since it is larger than the sum of its proper divisors (26269545).

78808623 is a wasteful number, since it uses less digits than its factorization.

78808623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26269544.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 78808623 is about 8877.4220920265. The cubic root of 78808623 is about 428.7372780808.

The spelling of 78808623 in words is "seventy-eight million, eight hundred eight thousand, six hundred twenty-three".