1387801903 has 2 divisors, whose sum is σ = 1387801904. Its totient is φ = 1387801902.

The previous prime is 1387801879. The next prime is 1387801937. The reversal of 1387801903 is 3091087831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1387801903 - 2⁵ = 1387801871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387801603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693900951 + 693900952.

It is an arithmetic number, because the mean of its divisors is an integer number (693900952).

Almost surely, 2^1387801903 is an apocalyptic number.

1387801903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387801903 is an equidigital number, since it uses as much as digits as its factorization.

1387801903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1387801903 is about 37253.2133244905. The cubic root of 1387801903 is about 1115.4304418369.

The spelling of 1387801903 in words is "one billion, three hundred eighty-seven million, eight hundred one thousand, nine hundred three".