981375271 has 2 divisors, whose sum is σ = 981375272. Its totient is φ = 981375270.

The previous prime is 981375211. The next prime is 981375299. The reversal of 981375271 is 172573189.

It is a strong prime.

It is an emirp because it is prime and its reverse (172573189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 981375271 - 2²⁷ = 847157543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981375211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490687635 + 490687636.

It is an arithmetic number, because the mean of its divisors is an integer number (490687636).

Almost surely, 2^981375271 is an apocalyptic number.

981375271 is a deficient number, since it is larger than the sum of its proper divisors (1).

981375271 is an equidigital number, since it uses as much as digits as its factorization.

981375271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 43.

The square root of 981375271 is about 31326.9096943826. The cubic root of 981375271 is about 993.7528108988.

The spelling of 981375271 in words is "nine hundred eighty-one million, three hundred seventy-five thousand, two hundred seventy-one".