78625423 has 2 divisors, whose sum is σ = 78625424. Its totient is φ = 78625422.

The previous prime is 78625411. The next prime is 78625427. The reversal of 78625423 is 32452687.

It is a strong prime.

It is an emirp because it is prime and its reverse (32452687) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78625423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78625427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39312711 + 39312712.

It is an arithmetic number, because the mean of its divisors is an integer number (39312712).

Almost surely, 2^78625423 is an apocalyptic number.

78625423 is a deficient number, since it is larger than the sum of its proper divisors (1).

78625423 is an equidigital number, since it uses as much as digits as its factorization.

78625423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 37.

The square root of 78625423 is about 8867.0977777399. The cubic root of 78625423 is about 428.4048034216.

The spelling of 78625423 in words is "seventy-eight million, six hundred twenty-five thousand, four hundred twenty-three".