38673821 has 2 divisors, whose sum is σ = 38673822. Its totient is φ = 38673820.

The previous prime is 38673773. The next prime is 38673847. The reversal of 38673821 is 12837683.

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., 38613796 + 60025 = 6214^2 + 245^2 .

It is a cyclic number.

It is not a de Polignac number, because 38673821 - 2⁶ = 38673757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38673121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19336910 + 19336911.

It is an arithmetic number, because the mean of its divisors is an integer number (19336911).

Almost surely, 2^38673821 is an apocalyptic number.

It is an amenable number.

38673821 is a deficient number, since it is larger than the sum of its proper divisors (1).

38673821 is an equidigital number, since it uses as much as digits as its factorization.

38673821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 38673821 is about 6218.8279442352. The cubic root of 38673821 is about 338.1730758149.

The spelling of 38673821 in words is "thirty-eight million, six hundred seventy-three thousand, eight hundred twenty-one".