38839421 has 2 divisors, whose sum is σ = 38839422. Its totient is φ = 38839420.

The previous prime is 38839417. The next prime is 38839429. The reversal of 38839421 is 12493883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38613796 + 225625 = 6214^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 38839421 - 2² = 38839417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38839429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19419710 + 19419711.

It is an arithmetic number, because the mean of its divisors is an integer number (19419711).

Almost surely, 2^38839421 is an apocalyptic number.

It is an amenable number.

38839421 is a deficient number, since it is larger than the sum of its proper divisors (1).

38839421 is an equidigital number, since it uses as much as digits as its factorization.

38839421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 38839421 is about 6232.1281276944. The cubic root of 38839421 is about 338.6550704166.

The spelling of 38839421 in words is "thirty-eight million, eight hundred thirty-nine thousand, four hundred twenty-one".