138677501 has 2 divisors, whose sum is σ = 138677502. Its totient is φ = 138677500.

The previous prime is 138677491. The next prime is 138677519. The reversal of 138677501 is 105776831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93586276 + 45091225 = 9674^2 + 6715^2 .

It is a cyclic number.

It is not a de Polignac number, because 138677501 - 2⁶ = 138677437 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138677531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69338750 + 69338751.

It is an arithmetic number, because the mean of its divisors is an integer number (69338751).

Almost surely, 2^138677501 is an apocalyptic number.

It is an amenable number.

138677501 is a deficient number, since it is larger than the sum of its proper divisors (1).

138677501 is an equidigital number, since it uses as much as digits as its factorization.

138677501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 138677501 is about 11776.1411761239. The cubic root of 138677501 is about 517.6092183926.

It can be divided in two parts, 1386 and 77501, that added together give a palindrome (78887).

The spelling of 138677501 in words is "one hundred thirty-eight million, six hundred seventy-seven thousand, five hundred one".