981473321 has 2 divisors, whose sum is σ = 981473322. Its totient is φ = 981473320.

The previous prime is 981473263. The next prime is 981473333. The reversal of 981473321 is 123374189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 872375296 + 109098025 = 29536^2 + 10445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981473321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (981473341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490736660 + 490736661.

It is an arithmetic number, because the mean of its divisors is an integer number (490736661).

Almost surely, 2^981473321 is an apocalyptic number.

It is an amenable number.

981473321 is a deficient number, since it is larger than the sum of its proper divisors (1).

981473321 is an equidigital number, since it uses as much as digits as its factorization.

981473321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 981473321 is about 31328.4746037850. The cubic root of 981473321 is about 993.7859053467.

The spelling of 981473321 in words is "nine hundred eighty-one million, four hundred seventy-three thousand, three hundred twenty-one".