1423257979 has 8 divisors (see below), whose sum is σ = 1672079472. Its totient is φ = 1194342240.

The previous prime is 1423257973. The next prime is 1423258049. The reversal of 1423257979 is 9797523241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1423257979 - 2⁹ = 1423257467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423257973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4976284 + ... + 4976569.

It is an arithmetic number, because the mean of its divisors is an integer number (209009934).

Almost surely, 2^1423257979 is an apocalyptic number.

1423257979 is a deficient number, since it is larger than the sum of its proper divisors (248821493).

1423257979 is a wasteful number, since it uses less digits than its factorization.

1423257979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9952877.

The product of its digits is 952560, while the sum is 49.

The square root of 1423257979 is about 37726.0914885176. The cubic root of 1423257979 is about 1124.8498180429.

The spelling of 1423257979 in words is "one billion, four hundred twenty-three million, two hundred fifty-seven thousand, nine hundred seventy-nine".