138358349 has 2 divisors, whose sum is σ = 138358350. Its totient is φ = 138358348.

The previous prime is 138358303. The next prime is 138358351. The reversal of 138358349 is 943853831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82482724 + 55875625 = 9082^2 + 7475^2 .

It is a cyclic number.

It is not a de Polignac number, because 138358349 - 2¹² = 138354253 is a prime.

Together with 138358351, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138358049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69179174 + 69179175.

It is an arithmetic number, because the mean of its divisors is an integer number (69179175).

Almost surely, 2^138358349 is an apocalyptic number.

It is an amenable number.

138358349 is a deficient number, since it is larger than the sum of its proper divisors (1).

138358349 is an equidigital number, since it uses as much as digits as its factorization.

138358349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 44.

The square root of 138358349 is about 11762.5825820693. The cubic root of 138358349 is about 517.2118386072.

The spelling of 138358349 in words is "one hundred thirty-eight million, three hundred fifty-eight thousand, three hundred forty-nine".