138862259 has 2 divisors, whose sum is σ = 138862260. Its totient is φ = 138862258.

The previous prime is 138862249. The next prime is 138862271. The reversal of 138862259 is 952268831.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138862259 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (138862249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69431129 + 69431130.

It is an arithmetic number, because the mean of its divisors is an integer number (69431130).

Almost surely, 2^138862259 is an apocalyptic number.

138862259 is a deficient number, since it is larger than the sum of its proper divisors (1).

138862259 is an equidigital number, since it uses as much as digits as its factorization.

138862259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 44.

The square root of 138862259 is about 11783.9831551136. The cubic root of 138862259 is about 517.8389841075.

The spelling of 138862259 in words is "one hundred thirty-eight million, eight hundred sixty-two thousand, two hundred fifty-nine".