78472423 has 2 divisors, whose sum is σ = 78472424. Its totient is φ = 78472422.

The previous prime is 78472421. The next prime is 78472447. The reversal of 78472423 is 32427487.

It is a weak prime.

It is an emirp because it is prime and its reverse (32427487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78472423 - 2¹ = 78472421 is a prime.

Together with 78472421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78472421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39236211 + 39236212.

It is an arithmetic number, because the mean of its divisors is an integer number (39236212).

Almost surely, 2^78472423 is an apocalyptic number.

78472423 is a deficient number, since it is larger than the sum of its proper divisors (1).

78472423 is an equidigital number, since it uses as much as digits as its factorization.

78472423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75264, while the sum is 37.

The square root of 78472423 is about 8858.4661764890. The cubic root of 78472423 is about 428.1267402774.

The spelling of 78472423 in words is "seventy-eight million, four hundred seventy-two thousand, four hundred twenty-three".