147878 has 4 divisors (see below), whose sum is σ = 221820. Its totient is φ = 73938.

The previous prime is 147863. The next prime is 147881. The reversal of 147878 is 878741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 878741 = 503 ⋅1747.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 147878.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36968 + ... + 36971.

It is an arithmetic number, because the mean of its divisors is an integer number (55455).

2¹⁴⁷⁸⁷⁸ is an apocalyptic number.

147878 is a deficient number, since it is larger than the sum of its proper divisors (73942).

147878 is an equidigital number, since it uses as much as digits as its factorization.

147878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73941.

The product of its digits is 12544, while the sum is 35.

The square root of 147878 is about 384.5490865936. The cubic root of 147878 is about 52.8811863206.

The spelling of 147878 in words is "one hundred forty-seven thousand, eight hundred seventy-eight".