1198903 has 2 divisors, whose sum is σ = 1198904. Its totient is φ = 1198902.

The previous prime is 1198877. The next prime is 1198927. The reversal of 1198903 is 3098911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1198903 - 2¹⁷ = 1067831 is a prime.

It is equal to p₉₂₈₅₇ and since 1198903 and 92857 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1198973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599451 + 599452.

It is an arithmetic number, because the mean of its divisors is an integer number (599452).

2^1198903 is an apocalyptic number.

1198903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198903 is an equidigital number, since it uses as much as digits as its factorization.

1198903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1198903 is about 1094.9442908203. The cubic root of 1198903 is about 106.2334654778.

The spelling of 1198903 in words is "one million, one hundred ninety-eight thousand, nine hundred three".