138716453 has 2 divisors, whose sum is σ = 138716454. Its totient is φ = 138716452.

The previous prime is 138716449. The next prime is 138716491. The reversal of 138716453 is 354617831.

It is an a-pointer prime, because the next prime (138716491) can be obtained adding 138716453 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131836324 + 6880129 = 11482^2 + 2623^2 .

It is an emirp because it is prime and its reverse (354617831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138716453 - 2² = 138716449 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138716443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69358226 + 69358227.

It is an arithmetic number, because the mean of its divisors is an integer number (69358227).

Almost surely, 2^138716453 is an apocalyptic number.

It is an amenable number.

138716453 is a deficient number, since it is larger than the sum of its proper divisors (1).

138716453 is an equidigital number, since it uses as much as digits as its factorization.

138716453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 138716453 is about 11777.7949124613. The cubic root of 138716453 is about 517.6576762095.

The spelling of 138716453 in words is "one hundred thirty-eight million, seven hundred sixteen thousand, four hundred fifty-three".