1381078807 has 4 divisors (see below), whose sum is σ = 1383847000. Its totient is φ = 1378310616.

The previous prime is 1381078801. The next prime is 1381078813. The reversal of 1381078807 is 7088701831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7088701831 = 31 ⋅228667801.

It is an interprime number because it is at equal distance from previous prime (1381078801) and next prime (1381078813).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1381078807 is a prime.

It is a super-2 number, since 2×1381078807² = 3814757342289086498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381078801) 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, 1383348 + ... + 1384345.

It is an arithmetic number, because the mean of its divisors is an integer number (345961750).

Almost surely, 2^1381078807 is an apocalyptic number.

1381078807 is a deficient number, since it is larger than the sum of its proper divisors (2768193).

1381078807 is an equidigital number, since it uses as much as digits as its factorization.

1381078807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768192.

The product of its (nonzero) digits is 75264, while the sum is 43.

The square root of 1381078807 is about 37162.8686594563. The cubic root of 1381078807 is about 1113.6263206833.

The spelling of 1381078807 in words is "one billion, three hundred eighty-one million, seventy-eight thousand, eight hundred seven".