138234571 has 2 divisors, whose sum is σ = 138234572. Its totient is φ = 138234570.

The previous prime is 138234541. The next prime is 138234583. The reversal of 138234571 is 175432831.

138234571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138234571 - 2⁹ = 138234059 is a prime.

It is not a weakly prime, because it can be changed into another prime (138234511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69117285 + 69117286.

It is an arithmetic number, because the mean of its divisors is an integer number (69117286).

Almost surely, 2^138234571 is an apocalyptic number.

138234571 is a deficient number, since it is larger than the sum of its proper divisors (1).

138234571 is an equidigital number, since it uses as much as digits as its factorization.

138234571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 34.

The square root of 138234571 is about 11757.3198901791. The cubic root of 138234571 is about 517.0575567540.

It can be divided in two parts, 1382 and 34571, that added together give a palindrome (35953).

The spelling of 138234571 in words is "one hundred thirty-eight million, two hundred thirty-four thousand, five hundred seventy-one".