138184877 has 2 divisors, whose sum is σ = 138184878. Its totient is φ = 138184876.

The previous prime is 138184817. The next prime is 138184889. The reversal of 138184877 is 778481831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137616361 + 568516 = 11731^2 + 754^2 .

It is a cyclic number.

It is not a de Polignac number, because 138184877 - 2¹⁰ = 138183853 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 (138184807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69092438 + 69092439.

It is an arithmetic number, because the mean of its divisors is an integer number (69092439).

Almost surely, 2^138184877 is an apocalyptic number.

It is an amenable number.

138184877 is a deficient number, since it is larger than the sum of its proper divisors (1).

138184877 is an equidigital number, since it uses as much as digits as its factorization.

138184877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 47.

The square root of 138184877 is about 11755.2063784521. The cubic root of 138184877 is about 516.9955902535.

The spelling of 138184877 in words is "one hundred thirty-eight million, one hundred eighty-four thousand, eight hundred seventy-seven".