1337968381 has 2 divisors, whose sum is σ = 1337968382. Its totient is φ = 1337968380.

The previous prime is 1337968361. The next prime is 1337968393. The reversal of 1337968381 is 1838697331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1318343481 + 19624900 = 36309^2 + 4430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1337968381 - 2¹³ = 1337960189 is a prime.

It is a super-2 number, since 2×1337968381² = 3580318777111522322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1337968361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 668984190 + 668984191.

It is an arithmetic number, because the mean of its divisors is an integer number (668984191).

Almost surely, 2^1337968381 is an apocalyptic number.

It is an amenable number.

1337968381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1337968381 is an equidigital number, since it uses as much as digits as its factorization.

1337968381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The square root of 1337968381 is about 36578.2501085003. The cubic root of 1337968381 is about 1101.9163237970.

The spelling of 1337968381 in words is "one billion, three hundred thirty-seven million, nine hundred sixty-eight thousand, three hundred eighty-one".