138877223 has 2 divisors, whose sum is σ = 138877224. Its totient is φ = 138877222.

The previous prime is 138877217. The next prime is 138877231. The reversal of 138877223 is 322778831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138877223 - 2⁶ = 138877159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138877253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69438611 + 69438612.

It is an arithmetic number, because the mean of its divisors is an integer number (69438612).

Almost surely, 2^138877223 is an apocalyptic number.

138877223 is a deficient number, since it is larger than the sum of its proper divisors (1).

138877223 is an equidigital number, since it uses as much as digits as its factorization.

138877223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 41.

The square root of 138877223 is about 11784.6180676338. The cubic root of 138877223 is about 517.8575844680.

The spelling of 138877223 in words is "one hundred thirty-eight million, eight hundred seventy-seven thousand, two hundred twenty-three".