1381617005 has 4 divisors (see below), whose sum is σ = 1657940412. Its totient is φ = 1105293600.

The previous prime is 1381616989. The next prime is 1381617031. The reversal of 1381617005 is 5007161831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5007161831 = 7 ⋅715308833.

It can be written as a sum of positive squares in 2 ways, for example, as 213481321 + 1168135684 = 14611^2 + 34178^2 .

It is not a de Polignac number, because 1381617005 - 2⁴ = 1381616989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 138161696 + ... + 138161705.

It is an arithmetic number, because the mean of its divisors is an integer number (414485103).

Almost surely, 2^1381617005 is an apocalyptic number.

It is an amenable number.

1381617005 is a deficient number, since it is larger than the sum of its proper divisors (276323407).

1381617005 is an equidigital number, since it uses as much as digits as its factorization.

1381617005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276323406.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1381617005 is about 37170.1090259364. The cubic root of 1381617005 is about 1113.7709596949.

Adding to 1381617005 its reverse (5007161831), we get a palindrome (6388778836).

The spelling of 1381617005 in words is "one billion, three hundred eighty-one million, six hundred seventeen thousand, five".