38481791 has 2 divisors, whose sum is σ = 38481792. Its totient is φ = 38481790.

The previous prime is 38481749. The next prime is 38481797. The reversal of 38481791 is 19718483.

It is a strong prime.

It is an emirp because it is prime and its reverse (19718483) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38481791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38481797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19240895 + 19240896.

It is an arithmetic number, because the mean of its divisors is an integer number (19240896).

Almost surely, 2^38481791 is an apocalyptic number.

38481791 is a deficient number, since it is larger than the sum of its proper divisors (1).

38481791 is an equidigital number, since it uses as much as digits as its factorization.

38481791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 38481791 is about 6203.3693264225. The cubic root of 38481791 is about 337.6124282044.

The spelling of 38481791 in words is "thirty-eight million, four hundred eighty-one thousand, seven hundred ninety-one".