1395009689 has 2 divisors, whose sum is σ = 1395009690. Its totient is φ = 1395009688.

The previous prime is 1395009653. The next prime is 1395009743. The reversal of 1395009689 is 9869005931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1163969689 + 231040000 = 34117^2 + 15200^2 .

It is an emirp because it is prime and its reverse (9869005931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1395009689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1395009989) 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 as a sum of consecutive naturals, namely, 697504844 + 697504845.

It is an arithmetic number, because the mean of its divisors is an integer number (697504845).

Almost surely, 2^1395009689 is an apocalyptic number.

It is an amenable number.

1395009689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1395009689 is an equidigital number, since it uses as much as digits as its factorization.

1395009689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 1395009689 is about 37349.8285002756. The cubic root of 1395009689 is about 1117.3581678003.

The spelling of 1395009689 in words is "one billion, three hundred ninety-five million, nine thousand, six hundred eighty-nine".