138275899 has 2 divisors, whose sum is σ = 138275900. Its totient is φ = 138275898.

The previous prime is 138275869. The next prime is 138275957. The reversal of 138275899 is 998572831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138275899 - 2¹³ = 138267707 is a prime.

It is not a weakly prime, because it can be changed into another prime (138275849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69137949 + 69137950.

It is an arithmetic number, because the mean of its divisors is an integer number (69137950).

Almost surely, 2^138275899 is an apocalyptic number.

138275899 is a deficient number, since it is larger than the sum of its proper divisors (1).

138275899 is an equidigital number, since it uses as much as digits as its factorization.

138275899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 52.

The square root of 138275899 is about 11759.0773022376. The cubic root of 138275899 is about 517.1090798652.

The spelling of 138275899 in words is "one hundred thirty-eight million, two hundred seventy-five thousand, eight hundred ninety-nine".