1381967 has 2 divisors, whose sum is σ = 1381968. Its totient is φ = 1381966.

The previous prime is 1381921. The next prime is 1381969. The reversal of 1381967 is 7691831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1381967 - 2¹⁴ = 1365583 is a prime.

Together with 1381969, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690983 + 690984.

It is an arithmetic number, because the mean of its divisors is an integer number (690984).

2^1381967 is an apocalyptic number.

1381967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381967 is an equidigital number, since it uses as much as digits as its factorization.

1381967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 1381967 is about 1175.5709251253. The cubic root of 1381967 is about 111.3864999590.

The spelling of 1381967 in words is "one million, three hundred eighty-one thousand, nine hundred sixty-seven".