904381 has 4 divisors (see below), whose sum is σ = 952000. Its totient is φ = 856764.

The previous prime is 904369. The next prime is 904399. The reversal of 904381 is 183409.

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 an emirpimes, since its reverse is a distinct semiprime: 183409 = 37 ⋅4957.

It is a cyclic number.

It is not a de Polignac number, because 904381 - 2¹¹ = 902333 is a prime.

It is a super-2 number, since 2×904381² = 1635809986322, which contains 22 as substring.

It is a Duffinian number.

904381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (904361) 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, 23781 + ... + 23818.

It is an arithmetic number, because the mean of its divisors is an integer number (238000).

2⁹⁰⁴³⁸¹ is an apocalyptic number.

It is an amenable number.

904381 is a deficient number, since it is larger than the sum of its proper divisors (47619).

904381 is a wasteful number, since it uses less digits than its factorization.

904381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47618.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 904381 is about 950.9894846948. The cubic root of 904381 is about 96.7053445434.

The spelling of 904381 in words is "nine hundred four thousand, three hundred eighty-one".