997444799 has 4 divisors (see below), whose sum is σ = 1074171336. Its totient is φ = 920718264.

The previous prime is 997444793. The next prime is 997444801.

997444799 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 997444799 - 2¹⁶ = 997379263 is a prime.

It is a super-2 number, since 2×997444799² = 1989792254104300802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997444793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38363249 + ... + 38363274.

It is an arithmetic number, because the mean of its divisors is an integer number (268542834).

Almost surely, 2^997444799 is an apocalyptic number.

997444799 is a deficient number, since it is larger than the sum of its proper divisors (76726537).

997444799 is a wasteful number, since it uses less digits than its factorization.

997444799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76726536.

The product of its digits is 20575296, while the sum is 62.

The square root of 997444799 is about 31582.3494851159. The cubic root of 997444799 is about 999.1475398515.

The spelling of 997444799 in words is "nine hundred ninety-seven million, four hundred forty-four thousand, seven hundred ninety-nine".