138245889 has 8 divisors (see below), whose sum is σ = 187805952. Its totient is φ = 90424880.

The previous prime is 138245869. The next prime is 138245959. The reversal of 138245889 is 988542831.

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 138245889 - 2⁷ = 138245761 is a prime.

It is a super-2 number, since 2×138245889² = 38223851650800642, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138245869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434577 + ... + 434894.

It is an arithmetic number, because the mean of its divisors is an integer number (23475744).

Almost surely, 2^138245889 is an apocalyptic number.

It is an amenable number.

138245889 is a deficient number, since it is larger than the sum of its proper divisors (49560063).

138245889 is an equidigital number, since it uses as much as digits as its factorization.

138245889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869527.

The product of its digits is 552960, while the sum is 48.

The square root of 138245889 is about 11757.8011975029. The cubic root of 138245889 is about 517.0716677869.

The spelling of 138245889 in words is "one hundred thirty-eight million, two hundred forty-five thousand, eight hundred eighty-nine".