904494194893 has 2 divisors, whose sum is σ = 904494194894. Its totient is φ = 904494194892.

The previous prime is 904494194827. The next prime is 904494194963. The reversal of 904494194893 is 398491494409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 747486472329 + 157007722564 = 864573^2 + 396242^2 .

It is a cyclic number.

It is not a de Polignac number, because 904494194893 - 2³³ = 895904260301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (904494195893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452247097446 + 452247097447.

It is an arithmetic number, because the mean of its divisors is an integer number (452247097447).

Almost surely, 2^904494194893 is an apocalyptic number.

It is an amenable number.

904494194893 is a deficient number, since it is larger than the sum of its proper divisors (1).

904494194893 is an equidigital number, since it uses as much as digits as its factorization.

904494194893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40310784, while the sum is 64.

The spelling of 904494194893 in words is "nine hundred four billion, four hundred ninety-four million, one hundred ninety-four thousand, eight hundred ninety-three".