1387834397 has 2 divisors, whose sum is σ = 1387834398. Its totient is φ = 1387834396.

The previous prime is 1387834361. The next prime is 1387834439. The reversal of 1387834397 is 7934387831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1141155961 + 246678436 = 33781^2 + 15706^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387834397 - 2⁸ = 1387834141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387834597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693917198 + 693917199.

It is an arithmetic number, because the mean of its divisors is an integer number (693917199).

Almost surely, 2^1387834397 is an apocalyptic number.

It is an amenable number.

1387834397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387834397 is an equidigital number, since it uses as much as digits as its factorization.

1387834397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 53.

The square root of 1387834397 is about 37253.6494453899. The cubic root of 1387834397 is about 1115.4391473334.

The spelling of 1387834397 in words is "one billion, three hundred eighty-seven million, eight hundred thirty-four thousand, three hundred ninety-seven".