2423209991 has 4 divisors (see below), whose sum is σ = 2424028584. Its totient is φ = 2422391400.

The previous prime is 2423209939. The next prime is 2423210029. The reversal of 2423209991 is 1999023242.

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 2423209991 - 2¹⁰ = 2423208967 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 (2423259991) 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, 404840 + ... + 410781.

It is an arithmetic number, because the mean of its divisors is an integer number (606007146).

Almost surely, 2^2423209991 is an apocalyptic number.

2423209991 is a deficient number, since it is larger than the sum of its proper divisors (818593).

2423209991 is an equidigital number, since it uses as much as digits as its factorization.

2423209991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818592.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 2423209991 is about 49226.1108660841. The cubic root of 2423209991 is about 1343.1680427147.

The spelling of 2423209991 in words is "two billion, four hundred twenty-three million, two hundred nine thousand, nine hundred ninety-one".