1387108249 has 2 divisors, whose sum is σ = 1387108250. Its totient is φ = 1387108248.

The previous prime is 1387108223. The next prime is 1387108279. The reversal of 1387108249 is 9428017831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 725332624 + 661775625 = 26932^2 + 25725^2 .

It is an emirp because it is prime and its reverse (9428017831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387108249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1387108279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693554124 + 693554125.

It is an arithmetic number, because the mean of its divisors is an integer number (693554125).

Almost surely, 2^1387108249 is an apocalyptic number.

It is an amenable number.

1387108249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387108249 is an equidigital number, since it uses as much as digits as its factorization.

1387108249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 1387108249 is about 37243.9021720335. The cubic root of 1387108249 is about 1115.2445719541.

The spelling of 1387108249 in words is "one billion, three hundred eighty-seven million, one hundred eight thousand, two hundred forty-nine".