138214249 has 2 divisors, whose sum is σ = 138214250. Its totient is φ = 138214248.

The previous prime is 138214243. The next prime is 138214333. The reversal of 138214249 is 942412831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119508624 + 18705625 = 10932^2 + 4325^2 .

It is a cyclic number.

It is not a de Polignac number, because 138214249 - 2⁹ = 138213737 is a prime.

It is not a weakly prime, because it can be changed into another prime (138214243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69107124 + 69107125.

It is an arithmetic number, because the mean of its divisors is an integer number (69107125).

Almost surely, 2^138214249 is an apocalyptic number.

It is an amenable number.

138214249 is a deficient number, since it is larger than the sum of its proper divisors (1).

138214249 is an equidigital number, since it uses as much as digits as its factorization.

138214249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The square root of 138214249 is about 11756.4556308438. The cubic root of 138214249 is about 517.0322177993.

The spelling of 138214249 in words is "one hundred thirty-eight million, two hundred fourteen thousand, two hundred forty-nine".