78500143 has 4 divisors (see below), whose sum is σ = 78604600. Its totient is φ = 78395688.

The previous prime is 78500137. The next prime is 78500159. The reversal of 78500143 is 34100587.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78500143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78500113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51093 + ... + 52606.

It is an arithmetic number, because the mean of its divisors is an integer number (19651150).

Almost surely, 2^78500143 is an apocalyptic number.

78500143 is a deficient number, since it is larger than the sum of its proper divisors (104457).

78500143 is a wasteful number, since it uses less digits than its factorization.

78500143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104456.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 78500143 is about 8860.0306432879. The cubic root of 78500143 is about 428.1771455691.

The spelling of 78500143 in words is "seventy-eight million, five hundred thousand, one hundred forty-three".