38949893 has 2 divisors, whose sum is σ = 38949894. Its totient is φ = 38949892.

The previous prime is 38949881. The next prime is 38949899. The reversal of 38949893 is 39894983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38912644 + 37249 = 6238^2 + 193^2 .

It is a cyclic number.

It is not a de Polignac number, because 38949893 - 2¹⁸ = 38687749 is a prime.

It is a super-2 number, since 2×38949893² = 3034188329422898, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38949899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19474946 + 19474947.

It is an arithmetic number, because the mean of its divisors is an integer number (19474947).

Almost surely, 2^38949893 is an apocalyptic number.

It is an amenable number.

38949893 is a deficient number, since it is larger than the sum of its proper divisors (1).

38949893 is an equidigital number, since it uses as much as digits as its factorization.

38949893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 53.

The square root of 38949893 is about 6240.9849382930. The cubic root of 38949893 is about 338.9758483561.

The spelling of 38949893 in words is "thirty-eight million, nine hundred forty-nine thousand, eight hundred ninety-three".