138003842 has 4 divisors (see below), whose sum is σ = 207005766. Its totient is φ = 69001920.

The previous prime is 138003791. The next prime is 138003857. The reversal of 138003842 is 248300831.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 123632161 + 14371681 = 11119^2 + 3791^2 .

It is an unprimeable number.

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, 34500959 + ... + 34500962.

Almost surely, 2^138003842 is an apocalyptic number.

138003842 is a deficient number, since it is larger than the sum of its proper divisors (69001924).

138003842 is an equidigital number, since it uses as much as digits as its factorization.

138003842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69001923.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 138003842 is about 11747.5036497121. The cubic root of 138003842 is about 516.7697208702.

The spelling of 138003842 in words is "one hundred thirty-eight million, three thousand, eight hundred forty-two".