138789005 has 8 divisors (see below), whose sum is σ = 166670592. Its totient is φ = 110948688.

The previous prime is 138788999. The next prime is 138789011. The reversal of 138789005 is 500987831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (138788999) and next prime (138789011).

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 138789005 - 2⁴ = 138788989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2357 + ... + 16826.

It is an arithmetic number, because the mean of its divisors is an integer number (20833824).

Almost surely, 2^138789005 is an apocalyptic number.

It is an amenable number.

138789005 is a deficient number, since it is larger than the sum of its proper divisors (27881587).

138789005 is a wasteful number, since it uses less digits than its factorization.

138789005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20635.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 138789005 is about 11780.8745430889. The cubic root of 138789005 is about 517.7479095670.

The spelling of 138789005 in words is "one hundred thirty-eight million, seven hundred eighty-nine thousand, five".