971913983 has 2 divisors, whose sum is σ = 971913984. Its totient is φ = 971913982.

The previous prime is 971913961. The next prime is 971913991. The reversal of 971913983 is 389319179.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 971913983 - 2⁸ = 971913727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971913923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485956991 + 485956992.

It is an arithmetic number, because the mean of its divisors is an integer number (485956992).

Almost surely, 2^971913983 is an apocalyptic number.

971913983 is a deficient number, since it is larger than the sum of its proper divisors (1).

971913983 is an equidigital number, since it uses as much as digits as its factorization.

971913983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 50.

The square root of 971913983 is about 31175.5350074381. The cubic root of 971913983 is about 990.5489534488.

The spelling of 971913983 in words is "nine hundred seventy-one million, nine hundred thirteen thousand, nine hundred eighty-three".