979830721 has 2 divisors, whose sum is σ = 979830722. Its totient is φ = 979830720.

The previous prime is 979830689. The next prime is 979830727. The reversal of 979830721 is 127038979.

It is a happy number.

979830721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 517107600 + 462723121 = 22740^2 + 21511^2 .

It is a cyclic number.

It is not a de Polignac number, because 979830721 - 2⁵ = 979830689 is a prime.

It is not a weakly prime, because it can be changed into another prime (979830727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489915360 + 489915361.

It is an arithmetic number, because the mean of its divisors is an integer number (489915361).

Almost surely, 2^979830721 is an apocalyptic number.

It is an amenable number.

979830721 is a deficient number, since it is larger than the sum of its proper divisors (1).

979830721 is an equidigital number, since it uses as much as digits as its factorization.

979830721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 979830721 is about 31302.2478585804. The cubic root of 979830721 is about 993.2311936353.

The spelling of 979830721 in words is "nine hundred seventy-nine million, eight hundred thirty thousand, seven hundred twenty-one".