78454623 has 8 divisors (see below), whose sum is σ = 112652848. Its totient is φ = 48279744.

The previous prime is 78454619. The next prime is 78454637. The reversal of 78454623 is 32645487.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78454623 - 2² = 78454619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 2011657 = 78454623 / (7 + 8 + 4 + 5 + 4 + 6 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78454223) 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 in 7 ways as a sum of consecutive naturals, for example, 1005790 + ... + 1005867.

It is an arithmetic number, because the mean of its divisors is an integer number (14081606).

Almost surely, 2^78454623 is an apocalyptic number.

78454623 is a deficient number, since it is larger than the sum of its proper divisors (34198225).

78454623 is a wasteful number, since it uses less digits than its factorization.

78454623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011673.

The product of its digits is 161280, while the sum is 39.

The square root of 78454623 is about 8857.4614309067. The cubic root of 78454623 is about 428.0943669843.

The spelling of 78454623 in words is "seventy-eight million, four hundred fifty-four thousand, six hundred twenty-three".