138232453 has 2 divisors, whose sum is σ = 138232454. Its totient is φ = 138232452.

The previous prime is 138232439. The next prime is 138232463. The reversal of 138232453 is 354232831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84327489 + 53904964 = 9183^2 + 7342^2 .

It is a cyclic number.

It is not a de Polignac number, because 138232453 - 2⁵ = 138232421 is a prime.

It is a super-2 number, since 2×138232453² = 38216422124794418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138232463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69116226 + 69116227.

It is an arithmetic number, because the mean of its divisors is an integer number (69116227).

Almost surely, 2^138232453 is an apocalyptic number.

It is an amenable number.

138232453 is a deficient number, since it is larger than the sum of its proper divisors (1).

138232453 is an equidigital number, since it uses as much as digits as its factorization.

138232453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

The square root of 138232453 is about 11757.2298182863. The cubic root of 138232453 is about 517.0549159928.

The spelling of 138232453 in words is "one hundred thirty-eight million, two hundred thirty-two thousand, four hundred fifty-three".