1396843819 has 16 divisors (see below), whose sum is σ = 1629824256. Its totient is φ = 1172397600.

The previous prime is 1396843757. The next prime is 1396843823. The reversal of 1396843819 is 9183486931.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1396843819 is a prime.

It is a super-2 number, since 2×1396843819² = 3902345309357009522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1396846819) 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 in 15 ways as a sum of consecutive naturals, for example, 89724 + ... + 104134.

It is an arithmetic number, because the mean of its divisors is an integer number (101864016).

Almost surely, 2^1396843819 is an apocalyptic number.

1396843819 is a deficient number, since it is larger than the sum of its proper divisors (232980437).

1396843819 is a wasteful number, since it uses less digits than its factorization.

1396843819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14706.

The product of its digits is 1119744, while the sum is 52.

The square root of 1396843819 is about 37374.3738275305. The cubic root of 1396843819 is about 1117.8476465107.

The spelling of 1396843819 in words is "one billion, three hundred ninety-six million, eight hundred forty-three thousand, eight hundred nineteen".