1395618613 has 2 divisors, whose sum is σ = 1395618614. Its totient is φ = 1395618612.

The previous prime is 1395618563. The next prime is 1395618619. The reversal of 1395618613 is 3168165931.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1339413604 + 56205009 = 36598^2 + 7497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1395618613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1395618613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1395618619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697809306 + 697809307.

It is an arithmetic number, because the mean of its divisors is an integer number (697809307).

Almost surely, 2^1395618613 is an apocalyptic number.

It is an amenable number.

1395618613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1395618613 is an equidigital number, since it uses as much as digits as its factorization.

1395618613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 43.

The square root of 1395618613 is about 37357.9792413883. The cubic root of 1395618613 is about 1117.5207203708.

The spelling of 1395618613 in words is "one billion, three hundred ninety-five million, six hundred eighteen thousand, six hundred thirteen".