1378998713 has 2 divisors, whose sum is σ = 1378998714. Its totient is φ = 1378998712.

The previous prime is 1378998697. The next prime is 1378998727. The reversal of 1378998713 is 3178998731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1252593664 + 126405049 = 35392^2 + 11243^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378998713 - 2⁴ = 1378998697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1378998113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689499356 + 689499357.

It is an arithmetic number, because the mean of its divisors is an integer number (689499357).

Almost surely, 2^1378998713 is an apocalyptic number.

It is an amenable number.

1378998713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378998713 is an equidigital number, since it uses as much as digits as its factorization.

1378998713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 56.

The square root of 1378998713 is about 37134.8719265329. The cubic root of 1378998713 is about 1113.0669484609.

The spelling of 1378998713 in words is "one billion, three hundred seventy-eight million, nine hundred ninety-eight thousand, seven hundred thirteen".