979806805 has 16 divisors (see below), whose sum is σ = 1228026240. Its totient is φ = 749725632.

The previous prime is 979806769. The next prime is 979806809. The reversal of 979806805 is 508608979.

It is a cyclic number.

It is not a de Polignac number, because 979806805 - 2⁹ = 979806293 is a prime.

It is a super-3 number, since 3×979806805³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979806809) 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, 33969 + ... + 55798.

It is an arithmetic number, because the mean of its divisors is an integer number (76751640).

Almost surely, 2^979806805 is an apocalyptic number.

It is an amenable number.

979806805 is a deficient number, since it is larger than the sum of its proper divisors (248219435).

979806805 is a wasteful number, since it uses less digits than its factorization.

979806805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89868.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 979806805 is about 31301.8658389560. The cubic root of 979806805 is about 993.2231125420.

The spelling of 979806805 in words is "nine hundred seventy-nine million, eight hundred six thousand, eight hundred five".