138577031 has 2 divisors, whose sum is σ = 138577032. Its totient is φ = 138577030.

The previous prime is 138576989. The next prime is 138577057. The reversal of 138577031 is 130775831.

It is a strong prime.

It is an emirp because it is prime and its reverse (130775831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138577031 is a prime.

It is a super-2 number, since 2×138577031² = 38407187041549922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138576982 and 138577000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138577331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69288515 + 69288516.

It is an arithmetic number, because the mean of its divisors is an integer number (69288516).

Almost surely, 2^138577031 is an apocalyptic number.

138577031 is a deficient number, since it is larger than the sum of its proper divisors (1).

138577031 is an equidigital number, since it uses as much as digits as its factorization.

138577031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 138577031 is about 11771.8745745952. The cubic root of 138577031 is about 517.4841878682.

The spelling of 138577031 in words is "one hundred thirty-eight million, five hundred seventy-seven thousand, thirty-one".