1395331643 has 2 divisors, whose sum is σ = 1395331644. Its totient is φ = 1395331642.

The previous prime is 1395331621. The next prime is 1395331703. The reversal of 1395331643 is 3461335931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1395331643 - 2¹⁸ = 1395069499 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1395331597 and 1395331606.

It is not a weakly prime, because it can be changed into another prime (1395331603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697665821 + 697665822.

It is an arithmetic number, because the mean of its divisors is an integer number (697665822).

Almost surely, 2^1395331643 is an apocalyptic number.

1395331643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1395331643 is an equidigital number, since it uses as much as digits as its factorization.

1395331643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 38.

The square root of 1395331643 is about 37354.1382312589. The cubic root of 1395331643 is about 1117.4441194758. Note that the first 3 decimals are identical.

The spelling of 1395331643 in words is "one billion, three hundred ninety-five million, three hundred thirty-one thousand, six hundred forty-three".