4939682978 has 4 divisors (see below), whose sum is σ = 7409524470. Its totient is φ = 2469841488.

The previous prime is 4939682977. The next prime is 4939682987. The reversal of 4939682978 is 8792869394.

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

It can be written as a sum of positive squares in only one way, i.e., 3274471729 + 1665211249 = 57223^2 + 40807^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4939682971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1234920743 + ... + 1234920746.

Almost surely, 2^4939682978 is an apocalyptic number.

4939682978 is a deficient number, since it is larger than the sum of its proper divisors (2469841492).

4939682978 is a wasteful number, since it uses less digits than its factorization.

4939682978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469841491.

The product of its digits is 47029248, while the sum is 65.

The square root of 4939682978 is about 70282.8782706002. The cubic root of 4939682978 is about 1703.0720665839.

The spelling of 4939682978 in words is "four billion, nine hundred thirty-nine million, six hundred eighty-two thousand, nine hundred seventy-eight".