799989997 has 4 divisors (see below), whose sum is σ = 805288096. Its totient is φ = 794691900.

The previous prime is 799989947. The next prime is 799990007.

799989997 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 799989997 - 2¹⁵ = 799957229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (799989907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2648823 + ... + 2649124.

It is an arithmetic number, because the mean of its divisors is an integer number (201322024).

Almost surely, 2^799989997 is an apocalyptic number.

It is an amenable number.

799989997 is a deficient number, since it is larger than the sum of its proper divisors (5298099).

799989997 is a wasteful number, since it uses less digits than its factorization.

799989997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5298098.

The product of its digits is 208324872, while the sum is 76.

The square root of 799989997 is about 28284.0944171808. The cubic root of 799989997 is about 928.3138975553.

The spelling of 799989997 in words is "seven hundred ninety-nine million, nine hundred eighty-nine thousand, nine hundred ninety-seven".