981473249 has 2 divisors, whose sum is σ = 981473250. Its totient is φ = 981473248.

The previous prime is 981473243. The next prime is 981473263. The reversal of 981473249 is 942374189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 685392400 + 296080849 = 26180^2 + 17207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981473249 is a prime.

It is not a weakly prime, because it can be changed into another prime (981473243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490736624 + 490736625.

It is an arithmetic number, because the mean of its divisors is an integer number (490736625).

Almost surely, 2^981473249 is an apocalyptic number.

It is an amenable number.

981473249 is a deficient number, since it is larger than the sum of its proper divisors (1).

981473249 is an equidigital number, since it uses as much as digits as its factorization.

981473249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 981473249 is about 31328.4734546706. The cubic root of 981473249 is about 993.7858810456.

The spelling of 981473249 in words is "nine hundred eighty-one million, four hundred seventy-three thousand, two hundred forty-nine".