38819491 has 2 divisors, whose sum is σ = 38819492. Its totient is φ = 38819490.

The previous prime is 38819461. The next prime is 38819507. The reversal of 38819491 is 19491883.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38819491 - 2⁹ = 38818979 is a prime.

It is not a weakly prime, because it can be changed into another prime (38819461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19409745 + 19409746.

It is an arithmetic number, because the mean of its divisors is an integer number (19409746).

Almost surely, 2^38819491 is an apocalyptic number.

38819491 is a deficient number, since it is larger than the sum of its proper divisors (1).

38819491 is an equidigital number, since it uses as much as digits as its factorization.

38819491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 43.

The square root of 38819491 is about 6230.5289502578. The cubic root of 38819491 is about 338.5971348606.

The spelling of 38819491 in words is "thirty-eight million, eight hundred nineteen thousand, four hundred ninety-one".