999397793999 has 16 divisors (see below), whose sum is σ = 1110989450880. Its totient is φ = 891325092000.

The previous prime is 999397793983. The next prime is 999397794001.

999397793999 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 999397793999 - 2⁴ = 999397793983 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 (999397793969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1249472 + ... + 1886789.

It is an arithmetic number, because the mean of its divisors is an integer number (69436840680).

Almost surely, 2^999397793999 is an apocalyptic number.

999397793999 is a deficient number, since it is larger than the sum of its proper divisors (111591656881).

999397793999 is a wasteful number, since it uses less digits than its factorization.

999397793999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3136822.

The product of its digits is 18983603961, while the sum is 92.

The spelling of 999397793999 in words is "nine hundred ninety-nine billion, three hundred ninety-seven million, seven hundred ninety-three thousand, nine hundred ninety-nine".