202687138 has 4 divisors (see below), whose sum is σ = 304030710. Its totient is φ = 101343568.

The previous prime is 202687129. The next prime is 202687151. The reversal of 202687138 is 831786202.

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., 176544369 + 26142769 = 13287^2 + 5113^2 .

It is a junction number, because it is equal to n+sod(n) for n = 202687097 and 202687106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50671783 + ... + 50671786.

Almost surely, 2^202687138 is an apocalyptic number.

202687138 is a deficient number, since it is larger than the sum of its proper divisors (101343572).

202687138 is a wasteful number, since it uses less digits than its factorization.

202687138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101343571.

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

The square root of 202687138 is about 14236.8233113992. The cubic root of 202687138 is about 587.4109844310.

The spelling of 202687138 in words is "two hundred two million, six hundred eighty-seven thousand, one hundred thirty-eight".