38997943 has 2 divisors, whose sum is σ = 38997944. Its totient is φ = 38997942.

The previous prime is 38997941. The next prime is 38997991. The reversal of 38997943 is 34979983.

It is a weak prime.

It is an emirp because it is prime and its reverse (34979983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38997943 - 2¹ = 38997941 is a prime.

Together with 38997941, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38997941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19498971 + 19498972.

It is an arithmetic number, because the mean of its divisors is an integer number (19498972).

Almost surely, 2^38997943 is an apocalyptic number.

38997943 is a deficient number, since it is larger than the sum of its proper divisors (1).

38997943 is an equidigital number, since it uses as much as digits as its factorization.

38997943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 52.

The square root of 38997943 is about 6244.8333044205. The cubic root of 38997943 is about 339.1151820411.

The spelling of 38997943 in words is "thirty-eight million, nine hundred ninety-seven thousand, nine hundred forty-three".