138425089 has 18 divisors (see below), whose sum is σ = 160633410. Its totient is φ = 119180160.

The previous prime is 138425087. The next prime is 138425107. The reversal of 138425089 is 980524831.

It can be written as a sum of positive squares in only one way, i.e., 132135025 + 6290064 = 11495^2 + 2508^2 .

It is not a de Polignac number, because 138425089 - 2¹ = 138425087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138425087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 42097 + ... + 45265.

Almost surely, 2^138425089 is an apocalyptic number.

138425089 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

138425089 is a deficient number, since it is larger than the sum of its proper divisors (22208321).

138425089 is a wasteful number, since it uses less digits than its factorization.

138425089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229 (or 3199 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 138425089 is about 11765.4192020514. The cubic root of 138425089 is about 517.2949878343.

The spelling of 138425089 in words is "one hundred thirty-eight million, four hundred twenty-five thousand, eighty-nine".