138202137 has 24 divisors (see below), whose sum is σ = 206219520. Its totient is φ = 89136960.

The previous prime is 138202133. The next prime is 138202151. The reversal of 138202137 is 731202831.

It is not a de Polignac number, because 138202137 - 2² = 138202133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138202137.

It is not an unprimeable number, because it can be changed into a prime (138202133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35812 + ... + 39482.

It is an arithmetic number, because the mean of its divisors is an integer number (8592480).

Almost surely, 2^138202137 is an apocalyptic number.

It is an amenable number.

138202137 is a deficient number, since it is larger than the sum of its proper divisors (68017383).

138202137 is a wasteful number, since it uses less digits than its factorization.

138202137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3813 (or 3810 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 138202137 is about 11755.9404983183. The cubic root of 138202137 is about 517.0171144912.

Adding to 138202137 its reverse (731202831), we get a palindrome (869404968).

The spelling of 138202137 in words is "one hundred thirty-eight million, two hundred two thousand, one hundred thirty-seven".