138403183 has 2 divisors, whose sum is σ = 138403184. Its totient is φ = 138403182.

The previous prime is 138403159. The next prime is 138403217. The reversal of 138403183 is 381304831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138403183 - 2²¹ = 136306031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138403583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69201591 + 69201592.

It is an arithmetic number, because the mean of its divisors is an integer number (69201592).

Almost surely, 2^138403183 is an apocalyptic number.

138403183 is a deficient number, since it is larger than the sum of its proper divisors (1).

138403183 is an equidigital number, since it uses as much as digits as its factorization.

138403183 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 31.

The square root of 138403183 is about 11764.4882166629. The cubic root of 138403183 is about 517.2676987980.

The spelling of 138403183 in words is "one hundred thirty-eight million, four hundred three thousand, one hundred eighty-three".