78345147 has 8 divisors (see below), whose sum is σ = 104560144. Its totient is φ = 52180128.

The previous prime is 78345143. The next prime is 78345149. The reversal of 78345147 is 74154387.

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

It is not a de Polignac number, because 78345147 - 2² = 78345143 is a prime.

It is a super-2 number, since 2×78345147² = 12275924116903218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78345143) 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, 8668 + ... + 15225.

It is an arithmetic number, because the mean of its divisors is an integer number (13070018).

Almost surely, 2^78345147 is an apocalyptic number.

78345147 is a deficient number, since it is larger than the sum of its proper divisors (26214997).

78345147 is a wasteful number, since it uses less digits than its factorization.

78345147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24989.

The product of its digits is 94080, while the sum is 39.

The square root of 78345147 is about 8851.2793990473. The cubic root of 78345147 is about 427.8951525718.

The spelling of 78345147 in words is "seventy-eight million, three hundred forty-five thousand, one hundred forty-seven".