979616842 has 4 divisors (see below), whose sum is σ = 1469425266. Its totient is φ = 489808420.

The previous prime is 979616837. The next prime is 979616881. The reversal of 979616842 is 248616979.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248616979 = 13 ⋅19124383.

It can be written as a sum of positive squares in only one way, i.e., 819619641 + 159997201 = 28629^2 + 12649^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 979616842.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244904209 + ... + 244904212.

Almost surely, 2^979616842 is an apocalyptic number.

979616842 is a deficient number, since it is larger than the sum of its proper divisors (489808424).

979616842 is a wasteful number, since it uses less digits than its factorization.

979616842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489808423.

The product of its digits is 1306368, while the sum is 52.

The square root of 979616842 is about 31298.8313200349. The cubic root of 979616842 is about 993.1589203509.

The spelling of 979616842 in words is "nine hundred seventy-nine million, six hundred sixteen thousand, eight hundred forty-two".