999997999403 has 8 divisors (see below), whose sum is σ = 1076961450096. Its totient is φ = 923040338400.

The previous prime is 999997999379. The next prime is 999997999417. The reversal of 999997999403 is 304999799999.

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 999997999403 - 2⁶ = 999997999339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999997999433) 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, 1085333 + ... + 1782678.

It is an arithmetic number, because the mean of its divisors is an integer number (134620181262).

Almost surely, 2^999997999403 is an apocalyptic number.

999997999403 is a deficient number, since it is larger than the sum of its proper divisors (76963450693).

999997999403 is a wasteful number, since it uses less digits than its factorization.

999997999403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2894845.

The product of its (nonzero) digits is 3615924564, while the sum is 86.

The spelling of 999997999403 in words is "nine hundred ninety-nine billion, nine hundred ninety-seven million, nine hundred ninety-nine thousand, four hundred three".