202409138 has 4 divisors (see below), whose sum is σ = 303613710. Its totient is φ = 101204568.

The previous prime is 202409113. The next prime is 202409149. The reversal of 202409138 is 831904202.

202409138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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., 201725209 + 683929 = 14203^2 + 827^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 202409138.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50602283 + ... + 50602286.

Almost surely, 2^202409138 is an apocalyptic number.

202409138 is a deficient number, since it is larger than the sum of its proper divisors (101204572).

202409138 is a wasteful number, since it uses less digits than its factorization.

202409138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101204571.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 202409138 is about 14227.0565472975. The cubic root of 202409138 is about 587.1423027383.

The spelling of 202409138 in words is "two hundred two million, four hundred nine thousand, one hundred thirty-eight".