1373943139 has 2 divisors, whose sum is σ = 1373943140. Its totient is φ = 1373943138.

The previous prime is 1373943119. The next prime is 1373943161. The reversal of 1373943139 is 9313493731.

It is a weak prime.

It is an emirp because it is prime and its reverse (9313493731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1373943139 - 2⁹ = 1373942627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1373943095 and 1373943104.

It is not a weakly prime, because it can be changed into another prime (1373943119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686971569 + 686971570.

It is an arithmetic number, because the mean of its divisors is an integer number (686971570).

Almost surely, 2^1373943139 is an apocalyptic number.

1373943139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373943139 is an equidigital number, since it uses as much as digits as its factorization.

1373943139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 43.

The square root of 1373943139 is about 37066.7389852412. The cubic root of 1373943139 is about 1111.7050707050.

The spelling of 1373943139 in words is "one billion, three hundred seventy-three million, nine hundred forty-three thousand, one hundred thirty-nine".