997707799 has 6 divisors (see below), whose sum is σ = 1096654160. Its totient is φ = 907006980.

The previous prime is 997707769. The next prime is 997707811.

997707799 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 997707799 - 2⁷ = 997707671 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 997707799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997707769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4122639 + ... + 4122880.

Almost surely, 2^997707799 is an apocalyptic number.

997707799 is a deficient number, since it is larger than the sum of its proper divisors (98946361).

997707799 is a wasteful number, since it uses less digits than its factorization.

997707799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8245541 (or 8245530 counting only the distinct ones).

The product of its (nonzero) digits is 15752961, while the sum is 64.

The square root of 997707799 is about 31586.5129287802. The cubic root of 997707799 is about 999.2353484570.

The spelling of 997707799 in words is "nine hundred ninety-seven million, seven hundred seven thousand, seven hundred ninety-nine".