138016477 has 2 divisors, whose sum is σ = 138016478. Its totient is φ = 138016476.

The previous prime is 138016471. The next prime is 138016499. The reversal of 138016477 is 774610831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137968516 + 47961 = 11746^2 + 219^2 .

It is a cyclic number.

It is not a de Polignac number, because 138016477 - 2³ = 138016469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138016471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69008238 + 69008239.

It is an arithmetic number, because the mean of its divisors is an integer number (69008239).

Almost surely, 2^138016477 is an apocalyptic number.

It is an amenable number.

138016477 is a deficient number, since it is larger than the sum of its proper divisors (1).

138016477 is an equidigital number, since it uses as much as digits as its factorization.

138016477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 138016477 is about 11748.0414112311. The cubic root of 138016477 is about 516.7854914122.

The spelling of 138016477 in words is "one hundred thirty-eight million, sixteen thousand, four hundred seventy-seven".