138511075 has 6 divisors (see below), whose sum is σ = 171753764. Its totient is φ = 110808840.

The previous prime is 138511073. The next prime is 138511103. The reversal of 138511075 is 570115831.

It is not a de Polignac number, because 138511075 - 2¹ = 138511073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138511073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2770197 + ... + 2770246.

Almost surely, 2^138511075 is an apocalyptic number.

138511075 is a deficient number, since it is larger than the sum of its proper divisors (33242689).

138511075 is an equidigital number, since it uses as much as digits as its factorization.

138511075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5540453 (or 5540448 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 31.

The square root of 138511075 is about 11769.0728181960. The cubic root of 138511075 is about 517.4020756470.

The spelling of 138511075 in words is "one hundred thirty-eight million, five hundred eleven thousand, seventy-five".