1381113641 has 2 divisors, whose sum is σ = 1381113642. Its totient is φ = 1381113640.

The previous prime is 1381113623. The next prime is 1381113647. The reversal of 1381113641 is 1463111831.

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., 1253514025 + 127599616 = 35405^2 + 11296^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381113641 - 2²² = 1376919337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1381113647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690556820 + 690556821.

It is an arithmetic number, because the mean of its divisors is an integer number (690556821).

Almost surely, 2^1381113641 is an apocalyptic number.

It is an amenable number.

1381113641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381113641 is an equidigital number, since it uses as much as digits as its factorization.

1381113641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

The square root of 1381113641 is about 37163.3373232276. The cubic root of 1381113641 is about 1113.6356833479.

The spelling of 1381113641 in words is "one billion, three hundred eighty-one million, one hundred thirteen thousand, six hundred forty-one".