1395274409 has 2 divisors, whose sum is σ = 1395274410. Its totient is φ = 1395274408.

The previous prime is 1395274339. The next prime is 1395274427. The reversal of 1395274409 is 9044725931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1107225625 + 288048784 = 33275^2 + 16972^2 .

It is an emirp because it is prime and its reverse (9044725931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1395274409 - 2¹² = 1395270313 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1395274409.

It is not a weakly prime, because it can be changed into another prime (1395274459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697637204 + 697637205.

It is an arithmetic number, because the mean of its divisors is an integer number (697637205).

Almost surely, 2^1395274409 is an apocalyptic number.

It is an amenable number.

1395274409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1395274409 is an equidigital number, since it uses as much as digits as its factorization.

1395274409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 1395274409 is about 37353.3721235446. The cubic root of 1395274409 is about 1117.4288407495.

The spelling of 1395274409 in words is "one billion, three hundred ninety-five million, two hundred seventy-four thousand, four hundred nine".