138753229 has 4 divisors (see below), whose sum is σ = 139053376. Its totient is φ = 138453084.

The previous prime is 138753221. The next prime is 138753239. The reversal of 138753229 is 922357831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138753229 - 2³ = 138753221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138753191 and 138753200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138753221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149379 + ... + 150304.

It is an arithmetic number, because the mean of its divisors is an integer number (34763344).

Almost surely, 2^138753229 is an apocalyptic number.

It is an amenable number.

138753229 is a deficient number, since it is larger than the sum of its proper divisors (300147).

138753229 is an equidigital number, since it uses as much as digits as its factorization.

138753229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300146.

The product of its digits is 90720, while the sum is 40.

The square root of 138753229 is about 11779.3560520090. The cubic root of 138753229 is about 517.7034186723.

The spelling of 138753229 in words is "one hundred thirty-eight million, seven hundred fifty-three thousand, two hundred twenty-nine".