138551453 has 2 divisors, whose sum is σ = 138551454. Its totient is φ = 138551452.

The previous prime is 138551449. The next prime is 138551503. The reversal of 138551453 is 354155831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136843204 + 1708249 = 11698^2 + 1307^2 .

It is a cyclic number.

It is not a de Polignac number, because 138551453 - 2² = 138551449 is a prime.

It is a super-2 number, since 2×138551453² = 38393010256822418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138551053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69275726 + 69275727.

It is an arithmetic number, because the mean of its divisors is an integer number (69275727).

Almost surely, 2^138551453 is an apocalyptic number.

It is an amenable number.

138551453 is a deficient number, since it is larger than the sum of its proper divisors (1).

138551453 is an equidigital number, since it uses as much as digits as its factorization.

138551453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 35.

The square root of 138551453 is about 11770.7881214471. The cubic root of 138551453 is about 517.4523475146.

The spelling of 138551453 in words is "one hundred thirty-eight million, five hundred fifty-one thousand, four hundred fifty-three".