138750229 has 2 divisors, whose sum is σ = 138750230. Its totient is φ = 138750228.

The previous prime is 138750193. The next prime is 138750247. The reversal of 138750229 is 922057831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103999204 + 34751025 = 10198^2 + 5895^2 .

It is a cyclic number.

It is not a de Polignac number, because 138750229 - 2¹⁷ = 138619157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138760229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69375114 + 69375115.

It is an arithmetic number, because the mean of its divisors is an integer number (69375115).

Almost surely, 2^138750229 is an apocalyptic number.

It is an amenable number.

138750229 is a deficient number, since it is larger than the sum of its proper divisors (1).

138750229 is an equidigital number, since it uses as much as digits as its factorization.

138750229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 138750229 is about 11779.2287098944. The cubic root of 138750229 is about 517.6996875365.

The spelling of 138750229 in words is "one hundred thirty-eight million, seven hundred fifty thousand, two hundred twenty-nine".