1423788449 has 4 divisors (see below), whose sum is σ = 1450652436. Its totient is φ = 1396924464.

The previous prime is 1423788439. The next prime is 1423788473. The reversal of 1423788449 is 9448873241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9448873241 = 17 ⋅555816073.

It can be written as a sum of positive squares in 2 ways, for example, as 684764224 + 739024225 = 26168^2 + 27185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423788449 - 2¹⁶ = 1423722913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1423788397 and 1423788406.

It is not an unprimeable number, because it can be changed into a prime (1423788409) 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, 13431914 + ... + 13432019.

It is an arithmetic number, because the mean of its divisors is an integer number (362663109).

Almost surely, 2^1423788449 is an apocalyptic number.

It is an amenable number.

1423788449 is a deficient number, since it is larger than the sum of its proper divisors (26863987).

1423788449 is an equidigital number, since it uses as much as digits as its factorization.

1423788449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26863986.

The product of its digits is 1548288, while the sum is 50.

The square root of 1423788449 is about 37733.1213789689. The cubic root of 1423788449 is about 1124.9895502568.

The spelling of 1423788449 in words is "one billion, four hundred twenty-three million, seven hundred eighty-eight thousand, four hundred forty-nine".