78454423 has 2 divisors, whose sum is σ = 78454424. Its totient is φ = 78454422.

The previous prime is 78454399. The next prime is 78454427. The reversal of 78454423 is 32445487.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78454423 - 2⁹ = 78453911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78454427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39227211 + 39227212.

It is an arithmetic number, because the mean of its divisors is an integer number (39227212).

Almost surely, 2^78454423 is an apocalyptic number.

78454423 is a deficient number, since it is larger than the sum of its proper divisors (1).

78454423 is an equidigital number, since it uses as much as digits as its factorization.

78454423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 37.

The square root of 78454423 is about 8857.4501409830. The cubic root of 78454423 is about 428.0940032117.

The spelling of 78454423 in words is "seventy-eight million, four hundred fifty-four thousand, four hundred twenty-three".