138102679 has 16 divisors (see below), whose sum is σ = 171793440. Its totient is φ = 109071360.

The previous prime is 138102677. The next prime is 138102691. The reversal of 138102679 is 976201831.

It is a cyclic number.

It is not a de Polignac number, because 138102679 - 2¹ = 138102677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138102677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25974 + ... + 30835.

It is an arithmetic number, because the mean of its divisors is an integer number (10737090).

Almost surely, 2^138102679 is an apocalyptic number.

138102679 is a deficient number, since it is larger than the sum of its proper divisors (33690761).

138102679 is a wasteful number, since it uses less digits than its factorization.

138102679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56850.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 138102679 is about 11751.7096203063. The cubic root of 138102679 is about 516.8930599011.

The spelling of 138102679 in words is "one hundred thirty-eight million, one hundred two thousand, six hundred seventy-nine".