904997 has 2 divisors, whose sum is σ = 904998. Its totient is φ = 904996.

The previous prime is 904987. The next prime is 904999. The reversal of 904997 is 799409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 829921 + 75076 = 911^2 + 274^2 .

It is a cyclic number.

It is not a de Polignac number, because 904997 - 2⁶ = 904933 is a prime.

Together with 904999, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 904997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (904999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452498 + 452499.

It is an arithmetic number, because the mean of its divisors is an integer number (452499).

2⁹⁰⁴⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

904997 is a deficient number, since it is larger than the sum of its proper divisors (1).

904997 is an equidigital number, since it uses as much as digits as its factorization.

904997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 904997 is about 951.3133027557. The cubic root of 904997 is about 96.7272958274.

The spelling of 904997 in words is "nine hundred four thousand, nine hundred ninety-seven".