138241889 has 4 divisors (see below), whose sum is σ = 138465840. Its totient is φ = 138017940.

The previous prime is 138241877. The next prime is 138241903. The reversal of 138241889 is 988142831.

138241889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 138241889 - 2¹² = 138237793 is a prime.

It is a super-2 number, since 2×138241889² = 38221639748576642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138241849) 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, 111047 + ... + 112284.

It is an arithmetic number, because the mean of its divisors is an integer number (34616460).

Almost surely, 2^138241889 is an apocalyptic number.

It is an amenable number.

138241889 is a deficient number, since it is larger than the sum of its proper divisors (223951).

138241889 is an equidigital number, since it uses as much as digits as its factorization.

138241889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223950.

The product of its digits is 110592, while the sum is 44.

The square root of 138241889 is about 11757.6310964412. The cubic root of 138241889 is about 517.0666807631.

The spelling of 138241889 in words is "one hundred thirty-eight million, two hundred forty-one thousand, eight hundred eighty-nine".