1318371541 has 2 divisors, whose sum is σ = 1318371542. Its totient is φ = 1318371540.

The previous prime is 1318371499. The next prime is 1318371553. The reversal of 1318371541 is 1451738131.

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., 710009316 + 608362225 = 26646^2 + 24665^2 .

It is an emirp because it is prime and its reverse (1451738131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1318371541 - 2¹⁹ = 1317847253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1318371497 and 1318371506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318371841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659185770 + 659185771.

It is an arithmetic number, because the mean of its divisors is an integer number (659185771).

Almost surely, 2^1318371541 is an apocalyptic number.

It is an amenable number.

1318371541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318371541 is an equidigital number, since it uses as much as digits as its factorization.

1318371541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The square root of 1318371541 is about 36309.3864035183. The cubic root of 1318371541 is about 1096.5100247237.

The spelling of 1318371541 in words is "one billion, three hundred eighteen million, three hundred seventy-one thousand, five hundred forty-one".