1378467449 has 4 divisors (see below), whose sum is σ = 1415723364. Its totient is φ = 1341211536.

The previous prime is 1378467413. The next prime is 1378467473. The reversal of 1378467449 is 9447648731.

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 1215777424 + 162690025 = 34868^2 + 12755^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378467449 - 2²⁰ = 1377418873 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 1378467449.

It is not an unprimeable number, because it can be changed into a prime (1378467479) 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 3 ways as a sum of consecutive naturals, for example, 18627902 + ... + 18627975.

It is an arithmetic number, because the mean of its divisors is an integer number (353930841).

Almost surely, 2^1378467449 is an apocalyptic number.

It is an amenable number.

1378467449 is a deficient number, since it is larger than the sum of its proper divisors (37255915).

1378467449 is an equidigital number, since it uses as much as digits as its factorization.

1378467449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37255914.

The product of its digits is 4064256, while the sum is 53.

The square root of 1378467449 is about 37127.7180688499. The cubic root of 1378467449 is about 1112.9239924771.

The spelling of 1378467449 in words is "one billion, three hundred seventy-eight million, four hundred sixty-seven thousand, four hundred forty-nine".