138573233 has 2 divisors, whose sum is σ = 138573234. Its totient is φ = 138573232.

The previous prime is 138573209. The next prime is 138573257. The reversal of 138573233 is 332375831.

It is a balanced prime because it is at equal distance from previous prime (138573209) and next prime (138573257).

It can be written as a sum of positive squares in only one way, i.e., 108014449 + 30558784 = 10393^2 + 5528^2 .

It is a cyclic number.

It is not a de Polignac number, because 138573233 - 2¹⁰ = 138572209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138573193 and 138573202.

It is not a weakly prime, because it can be changed into another prime (138573283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69286616 + 69286617.

It is an arithmetic number, because the mean of its divisors is an integer number (69286617).

Almost surely, 2^138573233 is an apocalyptic number.

It is an amenable number.

138573233 is a deficient number, since it is larger than the sum of its proper divisors (1).

138573233 is an equidigital number, since it uses as much as digits as its factorization.

138573233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 35.

The square root of 138573233 is about 11771.7132567864. The cubic root of 138573233 is about 517.4794602379.

The spelling of 138573233 in words is "one hundred thirty-eight million, five hundred seventy-three thousand, two hundred thirty-three".