138356077 has 2 divisors, whose sum is σ = 138356078. Its totient is φ = 138356076.

The previous prime is 138356059. The next prime is 138356083. The reversal of 138356077 is 770653831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73376356 + 64979721 = 8566^2 + 8061^2 .

It is a cyclic number.

It is not a de Polignac number, because 138356077 - 2¹⁹ = 137831789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138356677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69178038 + 69178039.

It is an arithmetic number, because the mean of its divisors is an integer number (69178039).

Almost surely, 2^138356077 is an apocalyptic number.

It is an amenable number.

138356077 is a deficient number, since it is larger than the sum of its proper divisors (1).

138356077 is an equidigital number, since it uses as much as digits as its factorization.

138356077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 138356077 is about 11762.4860042425. The cubic root of 138356077 is about 517.2090075246.

The spelling of 138356077 in words is "one hundred thirty-eight million, three hundred fifty-six thousand, seventy-seven".