138966165 has 48 divisors (see below), whose sum is σ = 267560640. Its totient is φ = 68402880.

The previous prime is 138966103. The next prime is 138966167. The reversal of 138966165 is 561669831.

It is not a de Polignac number, because 138966165 - 2⁶ = 138966101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 138966165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138966167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19770 + ... + 25860.

It is an arithmetic number, because the mean of its divisors is an integer number (5574180).

Almost surely, 2^138966165 is an apocalyptic number.

138966165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138966165 is a deficient number, since it is larger than the sum of its proper divisors (128594475).

138966165 is a wasteful number, since it uses less digits than its factorization.

138966165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6131 (or 6112 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 138966165 is about 11788.3911115979. The cubic root of 138966165 is about 517.9681124560.

The spelling of 138966165 in words is "one hundred thirty-eight million, nine hundred sixty-six thousand, one hundred sixty-five".