1387361473 has 2 divisors, whose sum is σ = 1387361474. Its totient is φ = 1387361472.

The previous prime is 1387361471. The next prime is 1387361501. The reversal of 1387361473 is 3741637831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 923734449 + 463627024 = 30393^2 + 21532^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387361473 - 2¹ = 1387361471 is a prime.

Together with 1387361471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1387361471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693680736 + 693680737.

It is an arithmetic number, because the mean of its divisors is an integer number (693680737).

Almost surely, 2^1387361473 is an apocalyptic number.

It is an amenable number.

1387361473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387361473 is an equidigital number, since it uses as much as digits as its factorization.

1387361473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 43.

The square root of 1387361473 is about 37247.3015532669. The cubic root of 1387361473 is about 1115.3124324373.

The spelling of 1387361473 in words is "one billion, three hundred eighty-seven million, three hundred sixty-one thousand, four hundred seventy-three".