138257351 has 2 divisors, whose sum is σ = 138257352. Its totient is φ = 138257350.

The previous prime is 138257321. The next prime is 138257359. The reversal of 138257351 is 153752831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138257351 - 2¹⁴ = 138240967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138257359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69128675 + 69128676.

It is an arithmetic number, because the mean of its divisors is an integer number (69128676).

Almost surely, 2^138257351 is an apocalyptic number.

138257351 is a deficient number, since it is larger than the sum of its proper divisors (1).

138257351 is an equidigital number, since it uses as much as digits as its factorization.

138257351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

The square root of 138257351 is about 11758.2886084668. The cubic root of 138257351 is about 517.0859575709.

The spelling of 138257351 in words is "one hundred thirty-eight million, two hundred fifty-seven thousand, three hundred fifty-one".