904499138 has 4 divisors (see below), whose sum is σ = 1356748710. Its totient is φ = 452249568.

The previous prime is 904499131. The next prime is 904499147. The reversal of 904499138 is 831994409.

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., 550043209 + 354455929 = 23453^2 + 18827^2 .

It is a junction number, because it is equal to n+sod(n) for n = 904499092 and 904499101.

It is not an unprimeable number, because it can be changed into a prime (904499131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 226124783 + ... + 226124786.

Almost surely, 2^904499138 is an apocalyptic number.

904499138 is a deficient number, since it is larger than the sum of its proper divisors (452249572).

904499138 is a wasteful number, since it uses less digits than its factorization.

904499138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452249571.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 904499138 is about 30074.8921527576. The cubic root of 904499138 is about 967.0955518717.

The spelling of 904499138 in words is "nine hundred four million, four hundred ninety-nine thousand, one hundred thirty-eight".