1378104445 has 4 divisors (see below), whose sum is σ = 1653725340. Its totient is φ = 1102483552.

The previous prime is 1378104407. The next prime is 1378104449. The reversal of 1378104445 is 5444018731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5444018731 = 137 ⋅39737363.

It can be written as a sum of positive squares in 2 ways, for example, as 781426116 + 596678329 = 27954^2 + 24427^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378104445 - 2¹³ = 1378096253 is a prime.

It is a super-2 number, since 2×1378104445² = 3798343722657516050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378104449) 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, 137810440 + ... + 137810449.

It is an arithmetic number, because the mean of its divisors is an integer number (413431335).

Almost surely, 2^1378104445 is an apocalyptic number.

It is an amenable number.

1378104445 is a deficient number, since it is larger than the sum of its proper divisors (275620895).

1378104445 is an equidigital number, since it uses as much as digits as its factorization.

1378104445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275620894.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 1378104445 is about 37122.8291621207. The cubic root of 1378104445 is about 1112.8262918679.

The spelling of 1378104445 in words is "one billion, three hundred seventy-eight million, one hundred four thousand, four hundred forty-five".