138680653 has 2 divisors, whose sum is σ = 138680654. Its totient is φ = 138680652.

The previous prime is 138680651. The next prime is 138680669. The reversal of 138680653 is 356086831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136726249 + 1954404 = 11693^2 + 1398^2 .

It is a cyclic number.

It is not a de Polignac number, because 138680653 - 2¹ = 138680651 is a prime.

Together with 138680651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138680651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69340326 + 69340327.

It is an arithmetic number, because the mean of its divisors is an integer number (69340327).

Almost surely, 2^138680653 is an apocalyptic number.

It is an amenable number.

138680653 is a deficient number, since it is larger than the sum of its proper divisors (1).

138680653 is an equidigital number, since it uses as much as digits as its factorization.

138680653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 138680653 is about 11776.2750052807. The cubic root of 138680653 is about 517.6131399417.

The spelling of 138680653 in words is "one hundred thirty-eight million, six hundred eighty thousand, six hundred fifty-three".