1396819 has 2 divisors, whose sum is σ = 1396820. Its totient is φ = 1396818.

The previous prime is 1396817. The next prime is 1396841. The reversal of 1396819 is 9186931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1396819 - 2¹ = 1396817 is a prime.

It is a super-2 number, since 2×1396819² = 3902206637522, which contains 22 as substring.

Together with 1396817, it forms a pair of twin primes.

1396819 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1396817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698409 + 698410.

It is an arithmetic number, because the mean of its divisors is an integer number (698410).

2^1396819 is an apocalyptic number.

1396819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396819 is an equidigital number, since it uses as much as digits as its factorization.

1396819 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 1396819 is about 1181.8709743453. The cubic root of 1396819 is about 111.7841025865.

The spelling of 1396819 in words is "one million, three hundred ninety-six thousand, eight hundred nineteen".