997974479799 has 24 divisors (see below), whose sum is σ = 1655332473600. Its totient is φ = 572999700240.

The previous prime is 997974479759. The next prime is 997974479809.

997974479799 is a `hidden beast` number, since 9 + 9 + 7 + 97 + 447 + 9 + 79 + 9 = 666.

997974479799 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 997974479799 - 2⁹ = 997974479287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997974479759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265275759 + ... + 265279520.

It is an arithmetic number, because the mean of its divisors is an integer number (68972186400).

Almost surely, 2^997974479799 is an apocalyptic number.

997974479799 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

997974479799 is a deficient number, since it is larger than the sum of its proper divisors (657357993801).

997974479799 is a wasteful number, since it uses less digits than its factorization.

997974479799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530555315 (or 530555312 counting only the distinct ones).

The product of its digits is 20415837456, while the sum is 90.

The spelling of 997974479799 in words is "nine hundred ninety-seven billion, nine hundred seventy-four million, four hundred seventy-nine thousand, seven hundred ninety-nine".