904135493 has 4 divisors (see below), whose sum is σ = 904231680. Its totient is φ = 904039308.

The previous prime is 904135483. The next prime is 904135499. The reversal of 904135493 is 394531409.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 394531409 = 19 ⋅20764811.

It is a cyclic number.

It is not a de Polignac number, because 904135493 - 2²⁰ = 903086917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (904135499) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 32255 + ... + 53372.

It is an arithmetic number, because the mean of its divisors is an integer number (226057920).

Almost surely, 2^904135493 is an apocalyptic number.

It is an amenable number.

904135493 is a deficient number, since it is larger than the sum of its proper divisors (96187).

904135493 is a wasteful number, since it uses less digits than its factorization.

904135493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96186.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 904135493 is about 30068.8458873965. The cubic root of 904135493 is about 966.9659307413.

The spelling of 904135493 in words is "nine hundred four million, one hundred thirty-five thousand, four hundred ninety-three".