138645883 has 8 divisors (see below), whose sum is σ = 140343840. Its totient is φ = 136953600.

The previous prime is 138645877. The next prime is 138645901. The reversal of 138645883 is 388546831.

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 138645883 - 2⁵ = 138645851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138645823) 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, 66978 + ... + 69016.

It is an arithmetic number, because the mean of its divisors is an integer number (17542980).

Almost surely, 2^138645883 is an apocalyptic number.

138645883 is a deficient number, since it is larger than the sum of its proper divisors (1697957).

138645883 is an equidigital number, since it uses as much as digits as its factorization.

138645883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837.

The product of its digits is 552960, while the sum is 46.

The square root of 138645883 is about 11774.7986394673. The cubic root of 138645883 is about 517.5698776870.

The spelling of 138645883 in words is "one hundred thirty-eight million, six hundred forty-five thousand, eight hundred eighty-three".