138167933 has 2 divisors, whose sum is σ = 138167934. Its totient is φ = 138167932.

The previous prime is 138167819. The next prime is 138167941. The reversal of 138167933 is 339761831.

138167933 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., 137288089 + 879844 = 11717^2 + 938^2 .

It is an emirp because it is prime and its reverse (339761831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138167933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138167963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69083966 + 69083967.

It is an arithmetic number, because the mean of its divisors is an integer number (69083967).

Almost surely, 2^138167933 is an apocalyptic number.

It is an amenable number.

138167933 is a deficient number, since it is larger than the sum of its proper divisors (1).

138167933 is an equidigital number, since it uses as much as digits as its factorization.

138167933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 138167933 is about 11754.4856544215. The cubic root of 138167933 is about 516.9744583431.

The spelling of 138167933 in words is "one hundred thirty-eight million, one hundred sixty-seven thousand, nine hundred thirty-three".