138610969 has 8 divisors (see below), whose sum is σ = 159622848. Its totient is φ = 117901680.

The previous prime is 138610961. The next prime is 138610987. The reversal of 138610969 is 969016831.

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 138610969 - 2³ = 138610961 is a prime.

It is a super-2 number, since 2×138610969² = 38426001454237922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138610961) 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, 74662 + ... + 76495.

It is an arithmetic number, because the mean of its divisors is an integer number (19952856).

Almost surely, 2^138610969 is an apocalyptic number.

It is an amenable number.

138610969 is a deficient number, since it is larger than the sum of its proper divisors (21011879).

138610969 is a wasteful number, since it uses less digits than its factorization.

138610969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151295.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 138610969 is about 11773.3159729959. The cubic root of 138610969 is about 517.5264289831.

The spelling of 138610969 in words is "one hundred thirty-eight million, six hundred ten thousand, nine hundred sixty-nine".