1397999903 has 2 divisors, whose sum is σ = 1397999904. Its totient is φ = 1397999902.

The previous prime is 1397999899. The next prime is 1397999927. The reversal of 1397999903 is 3099997931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1397999903 - 2² = 1397999899 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1397099903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698999951 + 698999952.

It is an arithmetic number, because the mean of its divisors is an integer number (698999952).

Almost surely, 2^1397999903 is an apocalyptic number.

1397999903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397999903 is an equidigital number, since it uses as much as digits as its factorization.

1397999903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3720087, while the sum is 59.

The square root of 1397999903 is about 37389.8368945359. The cubic root of 1397999903 is about 1118.1559533279.

The spelling of 1397999903 in words is "one billion, three hundred ninety-seven million, nine hundred ninety-nine thousand, nine hundred three".