1379668993 has 2 divisors, whose sum is σ = 1379668994. Its totient is φ = 1379668992.

The previous prime is 1379668943. The next prime is 1379669003. The reversal of 1379668993 is 3998669731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1189422144 + 190246849 = 34488^2 + 13793^2 .

It is a cyclic number.

It is not a de Polignac number, because 1379668993 - 2¹³ = 1379660801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1379668933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689834496 + 689834497.

It is an arithmetic number, because the mean of its divisors is an integer number (689834497).

Almost surely, 2^1379668993 is an apocalyptic number.

It is an amenable number.

1379668993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1379668993 is an equidigital number, since it uses as much as digits as its factorization.

1379668993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 61.

The square root of 1379668993 is about 37143.8957703685. The cubic root of 1379668993 is about 1113.2472594023.

The spelling of 1379668993 in words is "one billion, three hundred seventy-nine million, six hundred sixty-eight thousand, nine hundred ninety-three".