138353387 has 2 divisors, whose sum is σ = 138353388. Its totient is φ = 138353386.

The previous prime is 138353377. The next prime is 138353417. The reversal of 138353387 is 783353831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138353387 - 2²² = 134159083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138353377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69176693 + 69176694.

It is an arithmetic number, because the mean of its divisors is an integer number (69176694).

Almost surely, 2^138353387 is an apocalyptic number.

138353387 is a deficient number, since it is larger than the sum of its proper divisors (1).

138353387 is an equidigital number, since it uses as much as digits as its factorization.

138353387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 138353387 is about 11762.3716571107. The cubic root of 138353387 is about 517.2056555426.

The spelling of 138353387 in words is "one hundred thirty-eight million, three hundred fifty-three thousand, three hundred eighty-seven".