138499453 has 2 divisors, whose sum is σ = 138499454. Its totient is φ = 138499452.

The previous prime is 138499421. The next prime is 138499481. The reversal of 138499453 is 354994831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86918329 + 51581124 = 9323^2 + 7182^2 .

It is an emirp because it is prime and its reverse (354994831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138499453 - 2⁵ = 138499421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138499483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69249726 + 69249727.

It is an arithmetic number, because the mean of its divisors is an integer number (69249727).

Almost surely, 2^138499453 is an apocalyptic number.

It is an amenable number.

138499453 is a deficient number, since it is larger than the sum of its proper divisors (1).

138499453 is an equidigital number, since it uses as much as digits as its factorization.

138499453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 46.

The square root of 138499453 is about 11768.5790561138. The cubic root of 138499453 is about 517.3876040843.

The spelling of 138499453 in words is "one hundred thirty-eight million, four hundred ninety-nine thousand, four hundred fifty-three".