971979101 has 2 divisors, whose sum is σ = 971979102. Its totient is φ = 971979100.

The previous prime is 971979079. The next prime is 971979139. The reversal of 971979101 is 101979179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 958831225 + 13147876 = 30965^2 + 3626^2 .

It is an emirp because it is prime and its reverse (101979179) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971979101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971979161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485989550 + 485989551.

It is an arithmetic number, because the mean of its divisors is an integer number (485989551).

Almost surely, 2^971979101 is an apocalyptic number.

It is an amenable number.

971979101 is a deficient number, since it is larger than the sum of its proper divisors (1).

971979101 is an equidigital number, since it uses as much as digits as its factorization.

971979101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35721, while the sum is 44.

The square root of 971979101 is about 31176.5793665694. The cubic root of 971979101 is about 990.5710751342.

The spelling of 971979101 in words is "nine hundred seventy-one million, nine hundred seventy-nine thousand, one hundred one".