138176669 has 2 divisors, whose sum is σ = 138176670. Its totient is φ = 138176668.

The previous prime is 138176659. The next prime is 138176699. The reversal of 138176669 is 966671831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120012025 + 18164644 = 10955^2 + 4262^2 .

It is a cyclic number.

It is not a de Polignac number, because 138176669 - 2⁴ = 138176653 is a prime.

It is a super-2 number, since 2×138176669² = 38185583711871122, which contains 22 as substring.

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 (138176659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69088334 + 69088335.

It is an arithmetic number, because the mean of its divisors is an integer number (69088335).

Almost surely, 2^138176669 is an apocalyptic number.

It is an amenable number.

138176669 is a deficient number, since it is larger than the sum of its proper divisors (1).

138176669 is an equidigital number, since it uses as much as digits as its factorization.

138176669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 138176669 is about 11754.8572513663. The cubic root of 138176669 is about 516.9853537648.

The spelling of 138176669 in words is "one hundred thirty-eight million, one hundred seventy-six thousand, six hundred sixty-nine".