980656871 has 2 divisors, whose sum is σ = 980656872. Its totient is φ = 980656870.

The previous prime is 980656847. The next prime is 980656879. The reversal of 980656871 is 178656089.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 980656871 - 2¹⁴ = 980640487 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 (980656879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490328435 + 490328436.

It is an arithmetic number, because the mean of its divisors is an integer number (490328436).

Almost surely, 2^980656871 is an apocalyptic number.

980656871 is a deficient number, since it is larger than the sum of its proper divisors (1).

980656871 is an equidigital number, since it uses as much as digits as its factorization.

980656871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 980656871 is about 31315.4414147398. The cubic root of 980656871 is about 993.5102647788.

The spelling of 980656871 in words is "nine hundred eighty million, six hundred fifty-six thousand, eight hundred seventy-one".