1387312193 has 2 divisors, whose sum is σ = 1387312194. Its totient is φ = 1387312192.

The previous prime is 1387312177. The next prime is 1387312211. The reversal of 1387312193 is 3912137831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1179029569 + 208282624 = 34337^2 + 14432^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387312193 - 2⁴ = 1387312177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1387312103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693656096 + 693656097.

It is an arithmetic number, because the mean of its divisors is an integer number (693656097).

Almost surely, 2^1387312193 is an apocalyptic number.

It is an amenable number.

1387312193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387312193 is an equidigital number, since it uses as much as digits as its factorization.

1387312193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 1387312193 is about 37246.6400229605. The cubic root of 1387312193 is about 1115.2992267351.

The spelling of 1387312193 in words is "one billion, three hundred eighty-seven million, three hundred twelve thousand, one hundred ninety-three".