38640143 has 2 divisors, whose sum is σ = 38640144. Its totient is φ = 38640142.

The previous prime is 38640139. The next prime is 38640149. The reversal of 38640143 is 34104683.

38640143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38640143 - 2² = 38640139 is a prime.

It is equal to p_2355707 and since 38640143 and 2355707 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38640149) 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, 19320071 + 19320072.

It is an arithmetic number, because the mean of its divisors is an integer number (19320072).

Almost surely, 2^38640143 is an apocalyptic number.

38640143 is a deficient number, since it is larger than the sum of its proper divisors (1).

38640143 is an equidigital number, since it uses as much as digits as its factorization.

38640143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 38640143 is about 6216.1196095313. The cubic root of 38640143 is about 338.0748844969.

It can be divided in two parts, 38640 and 143, that added together give a palindrome (38783).

The spelling of 38640143 in words is "thirty-eight million, six hundred forty thousand, one hundred forty-three".