1395688321 has 4 divisors (see below), whose sum is σ = 1477787652. Its totient is φ = 1313588992.

The previous prime is 1395688313. The next prime is 1395688337. The reversal of 1395688321 is 1238865931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 469155600 + 926532721 = 21660^2 + 30439^2 .

It is a cyclic number.

It is not a de Polignac number, because 1395688321 - 2³ = 1395688313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1395688351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41049640 + ... + 41049673.

It is an arithmetic number, because the mean of its divisors is an integer number (369446913).

Almost surely, 2^1395688321 is an apocalyptic number.

It is an amenable number.

1395688321 is a deficient number, since it is larger than the sum of its proper divisors (82099331).

1395688321 is an equidigital number, since it uses as much as digits as its factorization.

1395688321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82099330.

The product of its digits is 311040, while the sum is 46.

The square root of 1395688321 is about 37358.9122031143. The cubic root of 1395688321 is about 1117.5393259403.

The spelling of 1395688321 in words is "one billion, three hundred ninety-five million, six hundred eighty-eight thousand, three hundred twenty-one".