1423109979 has 10 divisors (see below), whose sum is σ = 2125880460. Its totient is φ = 948739932.

The previous prime is 1423109977. The next prime is 1423110023. The reversal of 1423109979 is 9799013241.

It is not a de Polignac number, because 1423109979 - 2¹ = 1423109977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1423109977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8784549 + ... + 8784710.

It is an arithmetic number, because the mean of its divisors is an integer number (212588046).

Almost surely, 2^1423109979 is an apocalyptic number.

1423109979 is a deficient number, since it is larger than the sum of its proper divisors (702770481).

1423109979 is an equidigital number, since it uses as much as digits as its factorization.

1423109979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17569271 (or 17569262 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 1423109979 is about 37724.1299303244. The cubic root of 1423109979 is about 1124.8108268582.

The spelling of 1423109979 in words is "one billion, four hundred twenty-three million, one hundred nine thousand, nine hundred seventy-nine".