99779697799 has 8 divisors (see below), whose sum is σ = 103053448832. Its totient is φ = 96509387520.

The previous prime is 99779697791. The next prime is 99779697839.

99779697799 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 99779697799 - 2³ = 99779697791 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 (99779697791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 801174 + ... + 917299.

It is an arithmetic number, because the mean of its divisors is an integer number (12881681104).

Almost surely, 2^99779697799 is an apocalyptic number.

99779697799 is a deficient number, since it is larger than the sum of its proper divisors (3273751033).

99779697799 is a wasteful number, since it uses less digits than its factorization.

99779697799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720377.

The product of its digits is 7655939046, while the sum is 88.

The spelling of 99779697799 in words is "ninety-nine billion, seven hundred seventy-nine million, six hundred ninety-seven thousand, seven hundred ninety-nine".