1378486793 has 2 divisors, whose sum is σ = 1378486794. Its totient is φ = 1378486792.

The previous prime is 1378486751. The next prime is 1378486873. The reversal of 1378486793 is 3976848731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1378117129 + 369664 = 37123^2 + 608^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378486793 - 2¹⁸ = 1378224649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1378483793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689243396 + 689243397.

It is an arithmetic number, because the mean of its divisors is an integer number (689243397).

Almost surely, 2^1378486793 is an apocalyptic number.

It is an amenable number.

1378486793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378486793 is an equidigital number, since it uses as much as digits as its factorization.

1378486793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 56.

The square root of 1378486793 is about 37127.9785741158. The cubic root of 1378486793 is about 1112.9291983311.

The spelling of 1378486793 in words is "one billion, three hundred seventy-eight million, four hundred eighty-six thousand, seven hundred ninety-three".