38561893 has 2 divisors, whose sum is σ = 38561894. Its totient is φ = 38561892.

The previous prime is 38561867. The next prime is 38561903. The reversal of 38561893 is 39816583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38415204 + 146689 = 6198^2 + 383^2 .

It is an emirp because it is prime and its reverse (39816583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38561893 - 2¹³ = 38553701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38561813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19280946 + 19280947.

It is an arithmetic number, because the mean of its divisors is an integer number (19280947).

Almost surely, 2^38561893 is an apocalyptic number.

It is an amenable number.

38561893 is a deficient number, since it is larger than the sum of its proper divisors (1).

38561893 is an equidigital number, since it uses as much as digits as its factorization.

38561893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 38561893 is about 6209.8223001951. The cubic root of 38561893 is about 337.8465189051.

The spelling of 38561893 in words is "thirty-eight million, five hundred sixty-one thousand, eight hundred ninety-three".