2320400999 has 4 divisors (see below), whose sum is σ = 2651886864. Its totient is φ = 1988915136.

The previous prime is 2320400993. The next prime is 2320401071. The reversal of 2320400999 is 9990040232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2320400999 - 2¹⁶ = 2320335463 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 (2320400993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165742922 + ... + 165742935.

It is an arithmetic number, because the mean of its divisors is an integer number (662971716).

Almost surely, 2^2320400999 is an apocalyptic number.

2320400999 is a deficient number, since it is larger than the sum of its proper divisors (331485865).

2320400999 is an equidigital number, since it uses as much as digits as its factorization.

2320400999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331485864.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 2320400999 is about 48170.5407796093. The cubic root of 2320400999 is about 1323.8974569028.

The spelling of 2320400999 in words is "two billion, three hundred twenty million, four hundred thousand, nine hundred ninety-nine".