138641753 has 2 divisors, whose sum is σ = 138641754. Its totient is φ = 138641752.

The previous prime is 138641717. The next prime is 138641773. The reversal of 138641753 is 357146831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135792409 + 2849344 = 11653^2 + 1688^2 .

It is a cyclic number.

It is not a de Polignac number, because 138641753 - 2¹² = 138637657 is a prime.

It is equal to p_7839632 and since 138641753 and 7839632 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (138641773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69320876 + 69320877.

It is an arithmetic number, because the mean of its divisors is an integer number (69320877).

Almost surely, 2^138641753 is an apocalyptic number.

It is an amenable number.

138641753 is a deficient number, since it is larger than the sum of its proper divisors (1).

138641753 is an equidigital number, since it uses as much as digits as its factorization.

138641753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 138641753 is about 11774.6232636123. The cubic root of 138641753 is about 517.5647384917.

The spelling of 138641753 in words is "one hundred thirty-eight million, six hundred forty-one thousand, seven hundred fifty-three".