979466221 has 4 divisors (see below), whose sum is σ = 979541500. Its totient is φ = 979390944.

The previous prime is 979466209. The next prime is 979466249. The reversal of 979466221 is 122664979.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 511392996 + 468073225 = 22614^2 + 21635^2 .

It is a cyclic number.

It is not a de Polignac number, because 979466221 - 2⁹ = 979465709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979466281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12546 + ... + 46003.

It is an arithmetic number, because the mean of its divisors is an integer number (244885375).

Almost surely, 2^979466221 is an apocalyptic number.

979466221 is the 16729-th nonagonal number.

It is an amenable number.

979466221 is a deficient number, since it is larger than the sum of its proper divisors (75279).

979466221 is a wasteful number, since it uses less digits than its factorization.

979466221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75278.

The product of its digits is 326592, while the sum is 46.

The square root of 979466221 is about 31296.4250514336. The cubic root of 979466221 is about 993.1080166878.

The spelling of 979466221 in words is "nine hundred seventy-nine million, four hundred sixty-six thousand, two hundred twenty-one".