138842602 has 4 divisors (see below), whose sum is σ = 208263906. Its totient is φ = 69421300.

The previous prime is 138842593. The next prime is 138842617. The reversal of 138842602 is 206248831.

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., 123232201 + 15610401 = 11101^2 + 3951^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34710649 + ... + 34710652.

Almost surely, 2^138842602 is an apocalyptic number.

138842602 is a deficient number, since it is larger than the sum of its proper divisors (69421304).

138842602 is an equidigital number, since it uses as much as digits as its factorization.

138842602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69421303.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 138842602 is about 11783.1490697521. The cubic root of 138842602 is about 517.8145482833.

The spelling of 138842602 in words is "one hundred thirty-eight million, eight hundred forty-two thousand, six hundred two".