138033507 has 4 divisors (see below), whose sum is σ = 184044680. Its totient is φ = 92022336.

The previous prime is 138033503. The next prime is 138033527. The reversal of 138033507 is 705330831.

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

It is not a de Polignac number, because 138033507 - 2² = 138033503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138033503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23005582 + ... + 23005587.

It is an arithmetic number, because the mean of its divisors is an integer number (46011170).

Almost surely, 2^138033507 is an apocalyptic number.

138033507 is a deficient number, since it is larger than the sum of its proper divisors (46011173).

138033507 is an equidigital number, since it uses as much as digits as its factorization.

138033507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46011172.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 138033507 is about 11748.7661905410. The cubic root of 138033507 is about 516.8067461087.

The spelling of 138033507 in words is "one hundred thirty-eight million, thirty-three thousand, five hundred seven".