38969993 has 2 divisors, whose sum is σ = 38969994. Its totient is φ = 38969992.

The previous prime is 38969977. The next prime is 38970013. The reversal of 38969993 is 39996983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35844169 + 3125824 = 5987^2 + 1768^2 .

It is a cyclic number.

It is not a de Polignac number, because 38969993 - 2⁴ = 38969977 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (38962993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19484996 + 19484997.

It is an arithmetic number, because the mean of its divisors is an integer number (19484997).

Almost surely, 2^38969993 is an apocalyptic number.

It is an amenable number.

38969993 is a deficient number, since it is larger than the sum of its proper divisors (1).

38969993 is an equidigital number, since it uses as much as digits as its factorization.

38969993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2834352, while the sum is 56.

The square root of 38969993 is about 6242.5950533412. The cubic root of 38969993 is about 339.0341475567.

The spelling of 38969993 in words is "thirty-eight million, nine hundred sixty-nine thousand, nine hundred ninety-three".