138671677 has 2 divisors, whose sum is σ = 138671678. Its totient is φ = 138671676.

The previous prime is 138671651. The next prime is 138671693. The reversal of 138671677 is 776176831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136913401 + 1758276 = 11701^2 + 1326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138671677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138671647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69335838 + 69335839.

It is an arithmetic number, because the mean of its divisors is an integer number (69335839).

Almost surely, 2^138671677 is an apocalyptic number.

It is an amenable number.

138671677 is a deficient number, since it is larger than the sum of its proper divisors (1).

138671677 is an equidigital number, since it uses as much as digits as its factorization.

138671677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 46.

The square root of 138671677 is about 11775.8938938834. The cubic root of 138671677 is about 517.6019723282.

The spelling of 138671677 in words is "one hundred thirty-eight million, six hundred seventy-one thousand, six hundred seventy-seven".