978543939 has 16 divisors (see below), whose sum is σ = 1329433344. Its totient is φ = 640096800.

The previous prime is 978543899. The next prime is 978543959. The reversal of 978543939 is 939345879.

978543939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 978543939 - 2²¹ = 976446787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (978543959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34057 + ... + 55829.

It is an arithmetic number, because the mean of its divisors is an integer number (83089584).

Almost surely, 2^978543939 is an apocalyptic number.

978543939 is a deficient number, since it is larger than the sum of its proper divisors (350889405).

978543939 is a wasteful number, since it uses less digits than its factorization.

978543939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22058.

The product of its digits is 7348320, while the sum is 57.

The square root of 978543939 is about 31281.6869589861. The cubic root of 978543939 is about 992.7962096843.

The spelling of 978543939 in words is "nine hundred seventy-eight million, five hundred forty-three thousand, nine hundred thirty-nine".