997983447 has 8 divisors (see below), whose sum is σ = 1333806960. Its totient is φ = 663741120.

The previous prime is 997983421. The next prime is 997983463. The reversal of 997983447 is 744389799.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 997983447 - 2¹¹ = 997981399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997983047) 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 in 7 ways as a sum of consecutive naturals, for example, 393822 + ... + 396347.

It is an arithmetic number, because the mean of its divisors is an integer number (166725870).

Almost surely, 2^997983447 is an apocalyptic number.

997983447 is a deficient number, since it is larger than the sum of its proper divisors (335823513).

997983447 is a wasteful number, since it uses less digits than its factorization.

997983447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790593.

The product of its digits is 13716864, while the sum is 60.

The square root of 997983447 is about 31590.8760087466. The cubic root of 997983447 is about 999.3273633280.

The spelling of 997983447 in words is "nine hundred ninety-seven million, nine hundred eighty-three thousand, four hundred forty-seven".