138217283 has 4 divisors (see below), whose sum is σ = 138743088. Its totient is φ = 137691480.

The previous prime is 138217279. The next prime is 138217297. The reversal of 138217283 is 382712831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138217283 - 2² = 138217279 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138217213) 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, 262508 + ... + 263033.

It is an arithmetic number, because the mean of its divisors is an integer number (34685772).

Almost surely, 2^138217283 is an apocalyptic number.

138217283 is a deficient number, since it is larger than the sum of its proper divisors (525805).

138217283 is an equidigital number, since it uses as much as digits as its factorization.

138217283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525804.

The product of its digits is 16128, while the sum is 35.

The square root of 138217283 is about 11756.5846656246. The cubic root of 138217283 is about 517.0360009699.

The spelling of 138217283 in words is "one hundred thirty-eight million, two hundred seventeen thousand, two hundred eighty-three".