1381277033 has 4 divisors (see below), whose sum is σ = 1382086980. Its totient is φ = 1380467088.

The previous prime is 1381277021. The next prime is 1381277039. The reversal of 1381277033 is 3307721831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3307721831 = 4957 ⋅667283.

It can be written as a sum of positive squares in 2 ways, for example, as 981756889 + 399520144 = 31333^2 + 19988^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381277033 - 2¹⁶ = 1381211497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1381276984 and 1381277002.

It is not an unprimeable number, because it can be changed into a prime (1381277039) 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, 402410 + ... + 405827.

It is an arithmetic number, because the mean of its divisors is an integer number (345521745).

Almost surely, 2^1381277033 is an apocalyptic number.

It is an amenable number.

1381277033 is a deficient number, since it is larger than the sum of its proper divisors (809947).

1381277033 is an equidigital number, since it uses as much as digits as its factorization.

1381277033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809946.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 1381277033 is about 37165.5355537896. The cubic root of 1381277033 is about 1113.6795976648.

Adding to 1381277033 its reverse (3307721831), we get a palindrome (4688998864).

The spelling of 1381277033 in words is "one billion, three hundred eighty-one million, two hundred seventy-seven thousand, thirty-three".