1387945001 has 2 divisors, whose sum is σ = 1387945002. Its totient is φ = 1387945000.

The previous prime is 1387944979. The next prime is 1387945037. The reversal of 1387945001 is 1005497831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1216963225 + 170981776 = 34885^2 + 13076^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387945001 - 2¹⁴ = 1387928617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1387945081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693972500 + 693972501.

It is an arithmetic number, because the mean of its divisors is an integer number (693972501).

Almost surely, 2^1387945001 is an apocalyptic number.

It is an amenable number.

1387945001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387945001 is an equidigital number, since it uses as much as digits as its factorization.

1387945001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1387945001 is about 37255.1338878281. The cubic root of 1387945001 is about 1115.4687783313.

The spelling of 1387945001 in words is "one billion, three hundred eighty-seven million, nine hundred forty-five thousand, one".