1385137049 has 2 divisors, whose sum is σ = 1385137050. Its totient is φ = 1385137048.

The previous prime is 1385137021. The next prime is 1385137051. The reversal of 1385137049 is 9407315831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1380642649 + 4494400 = 37157^2 + 2120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1385137049 is a prime.

Together with 1385137051, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1385136997 and 1385137015.

It is not a weakly prime, because it can be changed into another prime (1385137079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692568524 + 692568525.

It is an arithmetic number, because the mean of its divisors is an integer number (692568525).

Almost surely, 2^1385137049 is an apocalyptic number.

It is an amenable number.

1385137049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385137049 is an equidigital number, since it uses as much as digits as its factorization.

1385137049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 1385137049 is about 37217.4293711965. The cubic root of 1385137049 is about 1114.7160353907.

The spelling of 1385137049 in words is "one billion, three hundred eighty-five million, one hundred thirty-seven thousand, forty-nine".