38416921 has 2 divisors, whose sum is σ = 38416922. Its totient is φ = 38416920.

The previous prime is 38416901. The next prime is 38416943. The reversal of 38416921 is 12961483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22695696 + 15721225 = 4764^2 + 3965^2 .

It is an emirp because it is prime and its reverse (12961483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38416921 - 2²⁵ = 4862489 is a prime.

It is not a weakly prime, because it can be changed into another prime (38416901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19208460 + 19208461.

It is an arithmetic number, because the mean of its divisors is an integer number (19208461).

Almost surely, 2^38416921 is an apocalyptic number.

It is an amenable number.

38416921 is a deficient number, since it is larger than the sum of its proper divisors (1).

38416921 is an equidigital number, since it uses as much as digits as its factorization.

38416921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 38416921 is about 6198.1385108757. The cubic root of 38416921 is about 337.4226134414.

The spelling of 38416921 in words is "thirty-eight million, four hundred sixteen thousand, nine hundred twenty-one".