38820493 has 2 divisors, whose sum is σ = 38820494. Its totient is φ = 38820492.

The previous prime is 38820377. The next prime is 38820499. The reversal of 38820493 is 39402883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24780484 + 14040009 = 4978^2 + 3747^2 .

It is a cyclic number.

It is not a de Polignac number, because 38820493 - 2⁹ = 38819981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38820499) 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, 19410246 + 19410247.

It is an arithmetic number, because the mean of its divisors is an integer number (19410247).

Almost surely, 2^38820493 is an apocalyptic number.

It is an amenable number.

38820493 is a deficient number, since it is larger than the sum of its proper divisors (1).

38820493 is an equidigital number, since it uses as much as digits as its factorization.

38820493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 38820493 is about 6230.6093602472. The cubic root of 38820493 is about 338.6000481000.

The spelling of 38820493 in words is "thirty-eight million, eight hundred twenty thousand, four hundred ninety-three".