138501169 has 4 divisors (see below), whose sum is σ = 138641920. Its totient is φ = 138360420.

The previous prime is 138501119. The next prime is 138501173. The reversal of 138501169 is 961105831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138501169 - 2¹¹ = 138499121 is a prime.

It is a super-2 number, since 2×138501169² = 38365147628733122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138501119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68889 + ... + 70870.

It is an arithmetic number, because the mean of its divisors is an integer number (34660480).

Almost surely, 2^138501169 is an apocalyptic number.

It is an amenable number.

138501169 is a deficient number, since it is larger than the sum of its proper divisors (140751).

138501169 is an equidigital number, since it uses as much as digits as its factorization.

138501169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140750.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 138501169 is about 11768.6519618859. The cubic root of 138501169 is about 517.3897408761.

The spelling of 138501169 in words is "one hundred thirty-eight million, five hundred one thousand, one hundred sixty-nine".