138786202 has 4 divisors (see below), whose sum is σ = 208179306. Its totient is φ = 69393100.

The previous prime is 138786191. The next prime is 138786233. The reversal of 138786202 is 202687831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 202687831 = 3413 ⋅59387.

It can be written as a sum of positive squares in only one way, i.e., 137804121 + 982081 = 11739^2 + 991^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 34696549 + ... + 34696552.

Almost surely, 2^138786202 is an apocalyptic number.

138786202 is a deficient number, since it is larger than the sum of its proper divisors (69393104).

138786202 is an equidigital number, since it uses as much as digits as its factorization.

138786202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69393103.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 138786202 is about 11780.7555784848. The cubic root of 138786202 is about 517.7444240431.

The spelling of 138786202 in words is "one hundred thirty-eight million, seven hundred eighty-six thousand, two hundred two".