1395646321 has 2 divisors, whose sum is σ = 1395646322. Its totient is φ = 1395646320.

The previous prime is 1395646309. The next prime is 1395646363. The reversal of 1395646321 is 1236465931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1208257600 + 187388721 = 34760^2 + 13689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1395646321 - 2²⁹ = 858775409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1395626321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697823160 + 697823161.

It is an arithmetic number, because the mean of its divisors is an integer number (697823161).

Almost surely, 2^1395646321 is an apocalyptic number.

It is an amenable number.

1395646321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1395646321 is an equidigital number, since it uses as much as digits as its factorization.

1395646321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The square root of 1395646321 is about 37358.3500840174. The cubic root of 1395646321 is about 1117.5281159106.

The spelling of 1395646321 in words is "one billion, three hundred ninety-five million, six hundred forty-six thousand, three hundred twenty-one".