138427361 has 16 divisors (see below), whose sum is σ = 146562048. Its totient is φ = 130603200.

The previous prime is 138427349. The next prime is 138427391. The reversal of 138427361 is 163724831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138427361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138427301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151496 + ... + 152406.

It is an arithmetic number, because the mean of its divisors is an integer number (9160128).

Almost surely, 2^138427361 is an apocalyptic number.

It is an amenable number.

138427361 is a deficient number, since it is larger than the sum of its proper divisors (8134687).

138427361 is an equidigital number, since it uses as much as digits as its factorization.

138427361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072.

The product of its digits is 24192, while the sum is 35.

The square root of 138427361 is about 11765.5157558009. The cubic root of 138427361 is about 517.2978179758.

The spelling of 138427361 in words is "one hundred thirty-eight million, four hundred twenty-seven thousand, three hundred sixty-one".