38889894437 has 2 divisors, whose sum is σ = 38889894438. Its totient is φ = 38889894436.

The previous prime is 38889894401. The next prime is 38889894497. The reversal of 38889894437 is 73449898883.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38630330116 + 259564321 = 196546^2 + 16111^2 .

It is a cyclic number.

It is not a de Polignac number, because 38889894437 - 2¹² = 38889890341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38889894497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19444947218 + 19444947219.

It is an arithmetic number, because the mean of its divisors is an integer number (19444947219).

Almost surely, 2^38889894437 is an apocalyptic number.

It is an amenable number.

38889894437 is a deficient number, since it is larger than the sum of its proper divisors (1).

38889894437 is an equidigital number, since it uses as much as digits as its factorization.

38889894437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 334430208, while the sum is 71.

The spelling of 38889894437 in words is "thirty-eight billion, eight hundred eighty-nine million, eight hundred ninety-four thousand, four hundred thirty-seven".