38143909 has 2 divisors, whose sum is σ = 38143910. Its totient is φ = 38143908.

The previous prime is 38143883. The next prime is 38143921. The reversal of 38143909 is 90934183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37576900 + 567009 = 6130^2 + 753^2 .

It is a cyclic number.

It is not a de Polignac number, because 38143909 - 2²³ = 29755301 is a prime.

It is a super-3 number, since 3×38143909³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38143939) 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, 19071954 + 19071955.

It is an arithmetic number, because the mean of its divisors is an integer number (19071955).

Almost surely, 2^38143909 is an apocalyptic number.

It is an amenable number.

38143909 is a deficient number, since it is larger than the sum of its proper divisors (1).

38143909 is an equidigital number, since it uses as much as digits as its factorization.

38143909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 38143909 is about 6176.0755338645. The cubic root of 38143909 is about 336.6214082655.

The spelling of 38143909 in words is "thirty-eight million, one hundred forty-three thousand, nine hundred nine".