1381378667 has 8 divisors (see below), whose sum is σ = 1396673712. Its totient is φ = 1366128000.

The previous prime is 1381378657. The next prime is 1381378699. The reversal of 1381378667 is 7668731831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1381378667 - 2⁴ = 1381378651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381378637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53567 + ... + 75047.

It is an arithmetic number, because the mean of its divisors is an integer number (174584214).

Almost surely, 2^1381378667 is an apocalyptic number.

1381378667 is a deficient number, since it is larger than the sum of its proper divisors (15295045).

1381378667 is a wasteful number, since it uses less digits than its factorization.

1381378667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22189.

The product of its digits is 1016064, while the sum is 50.

The square root of 1381378667 is about 37166.9028437937. The cubic root of 1381378667 is about 1113.7069117453.

The spelling of 1381378667 in words is "one billion, three hundred eighty-one million, three hundred seventy-eight thousand, six hundred sixty-seven".