381613747 has 2 divisors, whose sum is σ = 381613748. Its totient is φ = 381613746.

The previous prime is 381613721. The next prime is 381613781. The reversal of 381613747 is 747316183.

It is a weak prime.

It is an emirp because it is prime and its reverse (747316183) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381613747 is a prime.

It is not a weakly prime, because it can be changed into another prime (381613717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190806873 + 190806874.

It is an arithmetic number, because the mean of its divisors is an integer number (190806874).

Almost surely, 2^381613747 is an apocalyptic number.

381613747 is a deficient number, since it is larger than the sum of its proper divisors (1).

381613747 is an equidigital number, since it uses as much as digits as its factorization.

381613747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The square root of 381613747 is about 19534.9365752746. The cubic root of 381613747 is about 725.3395140699.

The spelling of 381613747 in words is "three hundred eighty-one million, six hundred thirteen thousand, seven hundred forty-seven".