1398619 has 2 divisors, whose sum is σ = 1398620. Its totient is φ = 1398618.

The previous prime is 1398611. The next prime is 1398623. The reversal of 1398619 is 9168931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1398619 - 2³ = 1398611 is a prime.

It is a super-2 number, since 2×1398619² = 3912270214322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1398611) 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, 699309 + 699310.

It is an arithmetic number, because the mean of its divisors is an integer number (699310).

2^1398619 is an apocalyptic number.

1398619 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398619 is an equidigital number, since it uses as much as digits as its factorization.

1398619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 37.

The square root of 1398619 is about 1182.6322336213. The cubic root of 1398619 is about 111.8320985489.

The spelling of 1398619 in words is "one million, three hundred ninety-eight thousand, six hundred nineteen".