1381333757 has 2 divisors, whose sum is σ = 1381333758. Its totient is φ = 1381333756.

The previous prime is 1381333741. The next prime is 1381333777. The reversal of 1381333757 is 7573331831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1381311556 + 22201 = 37166^2 + 149^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381333757 - 2⁴ = 1381333741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381333777) 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, 690666878 + 690666879.

It is an arithmetic number, because the mean of its divisors is an integer number (690666879).

Almost surely, 2^1381333757 is an apocalyptic number.

It is an amenable number.

1381333757 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381333757 is an equidigital number, since it uses as much as digits as its factorization.

1381333757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 41.

The square root of 1381333757 is about 37166.2986723187. The cubic root of 1381333757 is about 1113.6948423732.

The spelling of 1381333757 in words is "one billion, three hundred eighty-one million, three hundred thirty-three thousand, seven hundred fifty-seven".