38763821 has 2 divisors, whose sum is σ = 38763822. Its totient is φ = 38763820.

The previous prime is 38763811. The next prime is 38763839. The reversal of 38763821 is 12836783.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33292900 + 5470921 = 5770^2 + 2339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38763821 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 (38763811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19381910 + 19381911.

It is an arithmetic number, because the mean of its divisors is an integer number (19381911).

Almost surely, 2^38763821 is an apocalyptic number.

It is an amenable number.

38763821 is a deficient number, since it is larger than the sum of its proper divisors (1).

38763821 is an equidigital number, since it uses as much as digits as its factorization.

38763821 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 38763821 is about 6226.0598294588. The cubic root of 38763821 is about 338.4351997106.

The spelling of 38763821 in words is "thirty-eight million, seven hundred sixty-three thousand, eight hundred twenty-one".