979517578 has 12 divisors (see below), whose sum is σ = 1590992118. Its totient is φ = 452084880.

The previous prime is 979517573. The next prime is 979517579. The reversal of 979517578 is 875715979.

It can be written as a sum of positive squares in 3 ways, for example, as 589178529 + 390339049 = 24273^2 + 19757^2 .

It is a super-2 number, since 2×979517578² = 1918909371221972168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (979517573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1448653 + ... + 1449328.

Almost surely, 2^979517578 is an apocalyptic number.

979517578 is a deficient number, since it is larger than the sum of its proper divisors (611474540).

979517578 is a wasteful number, since it uses less digits than its factorization.

979517578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2898009 (or 2897996 counting only the distinct ones).

The product of its digits is 5556600, while the sum is 58.

The square root of 979517578 is about 31297.2455337526. The cubic root of 979517578 is about 993.1253738142.

The spelling of 979517578 in words is "nine hundred seventy-nine million, five hundred seventeen thousand, five hundred seventy-eight".