138332641 has 2 divisors, whose sum is σ = 138332642. Its totient is φ = 138332640.

The previous prime is 138332627. The next prime is 138332651. The reversal of 138332641 is 146233831.

138332641 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 can be written as a sum of positive squares in only one way, i.e., 106523041 + 31809600 = 10321^2 + 5640^2 .

It is an emirp because it is prime and its reverse (146233831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138332641 - 2¹¹ = 138330593 is a prime.

It is not a weakly prime, because it can be changed into another prime (138332651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69166320 + 69166321.

It is an arithmetic number, because the mean of its divisors is an integer number (69166321).

Almost surely, 2^138332641 is an apocalyptic number.

It is an amenable number.

138332641 is a deficient number, since it is larger than the sum of its proper divisors (1).

138332641 is an equidigital number, since it uses as much as digits as its factorization.

138332641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 138332641 is about 11761.4897440758. The cubic root of 138332641 is about 517.1798027003.

The spelling of 138332641 in words is "one hundred thirty-eight million, three hundred thirty-two thousand, six hundred forty-one".