1440379819 has 2 divisors, whose sum is σ = 1440379820. Its totient is φ = 1440379818.

The previous prime is 1440379817. The next prime is 1440379823. The reversal of 1440379819 is 9189730441.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1440379819 - 2¹ = 1440379817 is a prime.

It is a super-2 number, since 2×1440379819² = 4149388045964945522, which contains 22 as substring.

Together with 1440379817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1440379817) 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 as a sum of consecutive naturals, namely, 720189909 + 720189910.

It is an arithmetic number, because the mean of its divisors is an integer number (720189910).

Almost surely, 2^1440379819 is an apocalyptic number.

1440379819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440379819 is an equidigital number, since it uses as much as digits as its factorization.

1440379819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1440379819 is about 37952.3361468039. The cubic root of 1440379819 is about 1129.3425101970.

The spelling of 1440379819 in words is "one billion, four hundred forty million, three hundred seventy-nine thousand, eight hundred nineteen".