1398911 has 2 divisors, whose sum is σ = 1398912. Its totient is φ = 1398910.

The previous prime is 1398871. The next prime is 1398967. The reversal of 1398911 is 1198931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1398911 - 2⁶ = 1398847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1398011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699455 + 699456.

It is an arithmetic number, because the mean of its divisors is an integer number (699456).

2^1398911 is an apocalyptic number.

1398911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398911 is an equidigital number, since it uses as much as digits as its factorization.

1398911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 32.

The square root of 1398911 is about 1182.7556806036. The cubic root of 1398911 is about 111.8398806779.

The spelling of 1398911 in words is "one million, three hundred ninety-eight thousand, nine hundred eleven".