980475581 has 2 divisors, whose sum is σ = 980475582. Its totient is φ = 980475580.

The previous prime is 980475547. The next prime is 980475583. The reversal of 980475581 is 185574089.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 911436100 + 69039481 = 30190^2 + 8309^2 .

It is a cyclic number.

It is not a de Polignac number, because 980475581 - 2¹⁴ = 980459197 is a prime.

It is a super-2 number, since 2×980475581² = 1922664729874575122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 980475583, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (980475583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490237790 + 490237791.

It is an arithmetic number, because the mean of its divisors is an integer number (490237791).

Almost surely, 2^980475581 is an apocalyptic number.

It is an amenable number.

980475581 is a deficient number, since it is larger than the sum of its proper divisors (1).

980475581 is an equidigital number, since it uses as much as digits as its factorization.

980475581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 47.

The square root of 980475581 is about 31312.5467025600. The cubic root of 980475581 is about 993.4490389544.

The spelling of 980475581 in words is "nine hundred eighty million, four hundred seventy-five thousand, five hundred eighty-one".