138964453 has 2 divisors, whose sum is σ = 138964454. Its totient is φ = 138964452.

The previous prime is 138964447. The next prime is 138964481. The reversal of 138964453 is 354469831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131744484 + 7219969 = 11478^2 + 2687^2 .

It is an emirp because it is prime and its reverse (354469831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138964453 - 2¹⁷ = 138833381 is a prime.

It is a super-2 number, since 2×138964453² = 38622238395178418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138964753) 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, 69482226 + 69482227.

It is an arithmetic number, because the mean of its divisors is an integer number (69482227).

Almost surely, 2^138964453 is an apocalyptic number.

It is an amenable number.

138964453 is a deficient number, since it is larger than the sum of its proper divisors (1).

138964453 is an equidigital number, since it uses as much as digits as its factorization.

138964453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 43.

The square root of 138964453 is about 11788.3184975636. The cubic root of 138964453 is about 517.9659854033.

The spelling of 138964453 in words is "one hundred thirty-eight million, nine hundred sixty-four thousand, four hundred fifty-three".