979977601 has 2 divisors, whose sum is σ = 979977602. Its totient is φ = 979977600.

The previous prime is 979977569. The next prime is 979977637. The reversal of 979977601 is 106779979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 872316225 + 107661376 = 29535^2 + 10376^2 .

It is an emirp because it is prime and its reverse (106779979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 979977601 - 2⁵ = 979977569 is a prime.

It is not a weakly prime, because it can be changed into another prime (979977641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489988800 + 489988801.

It is an arithmetic number, because the mean of its divisors is an integer number (489988801).

Almost surely, 2^979977601 is an apocalyptic number.

It is an amenable number.

979977601 is a deficient number, since it is larger than the sum of its proper divisors (1).

979977601 is an equidigital number, since it uses as much as digits as its factorization.

979977601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500282, while the sum is 55.

The square root of 979977601 is about 31304.5939280483. The cubic root of 979977601 is about 993.2808207479.

The spelling of 979977601 in words is "nine hundred seventy-nine million, nine hundred seventy-seven thousand, six hundred one".