971980111 has 2 divisors, whose sum is σ = 971980112. Its totient is φ = 971980110.

The previous prime is 971980103. The next prime is 971980129. The reversal of 971980111 is 111089179.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 971980111 - 2³ = 971980103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971980171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485990055 + 485990056.

It is an arithmetic number, because the mean of its divisors is an integer number (485990056).

Almost surely, 2^971980111 is an apocalyptic number.

971980111 is a deficient number, since it is larger than the sum of its proper divisors (1).

971980111 is an equidigital number, since it uses as much as digits as its factorization.

971980111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 37.

The square root of 971980111 is about 31176.5955646219. The cubic root of 971980111 is about 990.5714182405.

The spelling of 971980111 in words is "nine hundred seventy-one million, nine hundred eighty thousand, one hundred eleven".