1369888139 has 2 divisors, whose sum is σ = 1369888140. Its totient is φ = 1369888138.

The previous prime is 1369888127. The next prime is 1369888153. The reversal of 1369888139 is 9318889631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1369888139 - 2⁴ = 1369888123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1369888189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684944069 + 684944070.

It is an arithmetic number, because the mean of its divisors is an integer number (684944070).

Almost surely, 2^1369888139 is an apocalyptic number.

1369888139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1369888139 is an equidigital number, since it uses as much as digits as its factorization.

1369888139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 56.

The square root of 1369888139 is about 37011.9999324543. Note that the first 4 decimals coincide. The cubic root of 1369888139 is about 1110.6103125854.

The spelling of 1369888139 in words is "one billion, three hundred sixty-nine million, eight hundred eighty-eight thousand, one hundred thirty-nine".