979994161 has 2 divisors, whose sum is σ = 979994162. Its totient is φ = 979994160.

The previous prime is 979994159. The next prime is 979994203. The reversal of 979994161 is 161499979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 631014400 + 348979761 = 25120^2 + 18681^2 .

It is an emirp because it is prime and its reverse (161499979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 979994161 - 2¹ = 979994159 is a prime.

Together with 979994159, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (979991161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489997080 + 489997081.

It is an arithmetic number, because the mean of its divisors is an integer number (489997081).

Almost surely, 2^979994161 is an apocalyptic number.

It is an amenable number.

979994161 is a deficient number, since it is larger than the sum of its proper divisors (1).

979994161 is an equidigital number, since it uses as much as digits as its factorization.

979994161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102248, while the sum is 55.

The square root of 979994161 is about 31304.8584248516. The cubic root of 979994161 is about 993.2864156506.

The spelling of 979994161 in words is "nine hundred seventy-nine million, nine hundred ninety-four thousand, one hundred sixty-one".