138771202 has 4 divisors (see below), whose sum is σ = 208156806. Its totient is φ = 69385600.

The previous prime is 138771197. The next prime is 138771209. The reversal of 138771202 is 202177831.

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., 120802081 + 17969121 = 10991^2 + 4239^2 .

It is not an unprimeable number, because it can be changed into a prime (138771209) by changing a digit.

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, 34692799 + ... + 34692802.

Almost surely, 2^138771202 is an apocalyptic number.

138771202 is a deficient number, since it is larger than the sum of its proper divisors (69385604).

138771202 is an equidigital number, since it uses as much as digits as its factorization.

138771202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69385603.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 138771202 is about 11780.1189297901. The cubic root of 138771202 is about 517.7257707811.

The spelling of 138771202 in words is "one hundred thirty-eight million, seven hundred seventy-one thousand, two hundred two".