981340447 has 2 divisors, whose sum is σ = 981340448. Its totient is φ = 981340446.

The previous prime is 981340439. The next prime is 981340463. The reversal of 981340447 is 744043189.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981340447 - 2³ = 981340439 is a prime.

It is equal to p_49946350 and since 981340447 and 49946350 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981341447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490670223 + 490670224.

It is an arithmetic number, because the mean of its divisors is an integer number (490670224).

Almost surely, 2^981340447 is an apocalyptic number.

981340447 is a deficient number, since it is larger than the sum of its proper divisors (1).

981340447 is an equidigital number, since it uses as much as digits as its factorization.

981340447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 981340447 is about 31326.3538733763. The cubic root of 981340447 is about 993.7410563545.

The spelling of 981340447 in words is "nine hundred eighty-one million, three hundred forty thousand, four hundred forty-seven".