38027921 has 2 divisors, whose sum is σ = 38027922. Its totient is φ = 38027920.

The previous prime is 38027893. The next prime is 38027923. The reversal of 38027921 is 12972083.

38027921 = 4360² + 4361².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19018321 + 19009600 = 4361^2 + 4360^2 .

It is a cyclic number.

It is not a de Polignac number, because 38027921 - 2¹⁰ = 38026897 is a prime.

It is a super-2 number, since 2×38027921² = 2892245551164482, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 38027923, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (38027923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19013960 + 19013961.

It is an arithmetic number, because the mean of its divisors is an integer number (19013961).

Almost surely, 2^38027921 is an apocalyptic number.

38027921 is the 4361-st centered square number.

It is an amenable number.

38027921 is a deficient number, since it is larger than the sum of its proper divisors (1).

38027921 is an equidigital number, since it uses as much as digits as its factorization.

38027921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 38027921 is about 6166.6782792683. The cubic root of 38027921 is about 336.2798623764.

The spelling of 38027921 in words is "thirty-eight million, twenty-seven thousand, nine hundred twenty-one".