978870143 has 4 divisors (see below), whose sum is σ = 978933888. Its totient is φ = 978806400.

The previous prime is 978870127. The next prime is 978870161. The reversal of 978870143 is 341078879.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 978870143 - 2⁴ = 978870127 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 (978870173) 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, 6818 + ... + 44768.

It is an arithmetic number, because the mean of its divisors is an integer number (244733472).

Almost surely, 2^978870143 is an apocalyptic number.

978870143 is a deficient number, since it is larger than the sum of its proper divisors (63745).

978870143 is a wasteful number, since it uses less digits than its factorization.

978870143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63744.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 978870143 is about 31286.9005016477. The cubic root of 978870143 is about 992.9065157906.

The spelling of 978870143 in words is "nine hundred seventy-eight million, eight hundred seventy thousand, one hundred forty-three".