1396843823 has 2 divisors, whose sum is σ = 1396843824. Its totient is φ = 1396843822.

The previous prime is 1396843757. The next prime is 1396843853. The reversal of 1396843823 is 3283486931.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3283486931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1396843823 - 2²² = 1392649519 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1396843853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698421911 + 698421912.

It is an arithmetic number, because the mean of its divisors is an integer number (698421912).

Almost surely, 2^1396843823 is an apocalyptic number.

1396843823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396843823 is an equidigital number, since it uses as much as digits as its factorization.

1396843823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 47.

The square root of 1396843823 is about 37374.3738810431. The cubic root of 1396843823 is about 1117.8476475778.

The spelling of 1396843823 in words is "one billion, three hundred ninety-six million, eight hundred forty-three thousand, eight hundred twenty-three".