138164489 has 8 divisors (see below), whose sum is σ = 145040640. Its totient is φ = 131439600.

The previous prime is 138164483. The next prime is 138164501. The reversal of 138164489 is 984461831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138164489 - 2⁸ = 138164233 is a prime.

It is a super-2 number, since 2×138164489² = 38178852041262242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138164483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35942 + ... + 39599.

It is an arithmetic number, because the mean of its divisors is an integer number (18130080).

Almost surely, 2^138164489 is an apocalyptic number.

It is an amenable number.

138164489 is a deficient number, since it is larger than the sum of its proper divisors (6876151).

138164489 is an equidigital number, since it uses as much as digits as its factorization.

138164489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75631.

The product of its digits is 165888, while the sum is 44.

The square root of 138164489 is about 11754.3391562435. The cubic root of 138164489 is about 516.9701629064.

The spelling of 138164489 in words is "one hundred thirty-eight million, one hundred sixty-four thousand, four hundred eighty-nine".