138489121 has 8 divisors (see below), whose sum is σ = 144972288. Its totient is φ = 132132000.

The previous prime is 138489101. The next prime is 138489161. The reversal of 138489121 is 121984831.

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 138489121 - 2⁷ = 138488993 is a prime.

It is a deceptive number, since it divides R_138489120.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138489101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29260 + ... + 33661.

It is an arithmetic number, because the mean of its divisors is an integer number (18121536).

Almost surely, 2^138489121 is an apocalyptic number.

It is an amenable number.

138489121 is a deficient number, since it is larger than the sum of its proper divisors (6483167).

138489121 is an equidigital number, since it uses as much as digits as its factorization.

138489121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63023.

The product of its digits is 13824, while the sum is 37.

The square root of 138489121 is about 11768.1400824429. The cubic root of 138489121 is about 517.3747381330.

The spelling of 138489121 in words is "one hundred thirty-eight million, four hundred eighty-nine thousand, one hundred twenty-one".