138466313 has 2 divisors, whose sum is σ = 138466314. Its totient is φ = 138466312.

The previous prime is 138466291. The next prime is 138466337. The reversal of 138466313 is 313664831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104919049 + 33547264 = 10243^2 + 5792^2 .

It is a cyclic number.

It is not a de Polignac number, because 138466313 - 2⁶ = 138466249 is a prime.

It is not a weakly prime, because it can be changed into another prime (138466613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69233156 + 69233157.

It is an arithmetic number, because the mean of its divisors is an integer number (69233157).

Almost surely, 2^138466313 is an apocalyptic number.

It is an amenable number.

138466313 is a deficient number, since it is larger than the sum of its proper divisors (1).

138466313 is an equidigital number, since it uses as much as digits as its factorization.

138466313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 138466313 is about 11767.1709854153. The cubic root of 138466313 is about 517.3463341429.

The spelling of 138466313 in words is "one hundred thirty-eight million, four hundred sixty-six thousand, three hundred thirteen".