1423109993 has 4 divisors (see below), whose sum is σ = 1423739460. Its totient is φ = 1422480528.

The previous prime is 1423109977. The next prime is 1423110023. The reversal of 1423109993 is 3999013241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 65334889 + 1357775104 = 8083^2 + 36848^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423109993 - 2⁴ = 1423109977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1423109993.

It is not an unprimeable number, because it can be changed into a prime (1423109393) 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, 311330 + ... + 315867.

It is an arithmetic number, because the mean of its divisors is an integer number (355934865).

Almost surely, 2^1423109993 is an apocalyptic number.

It is an amenable number.

1423109993 is a deficient number, since it is larger than the sum of its proper divisors (629467).

1423109993 is an equidigital number, since it uses as much as digits as its factorization.

1423109993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629466.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 1423109993 is about 37724.1301158821. The cubic root of 1423109993 is about 1124.8108305467.

The spelling of 1423109993 in words is "one billion, four hundred twenty-three million, one hundred nine thousand, nine hundred ninety-three".