904987 has 2 divisors, whose sum is σ = 904988. Its totient is φ = 904986.

The previous prime is 904933. The next prime is 904997. The reversal of 904987 is 789409.

It is a happy number.

904987 is nontrivially palindromic in base 8.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-904987 is a prime.

It is not a weakly prime, because it can be changed into another prime (904907) 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 as a sum of consecutive naturals, namely, 452493 + 452494.

It is an arithmetic number, because the mean of its divisors is an integer number (452494).

2⁹⁰⁴⁹⁸⁷ is an apocalyptic number.

904987 is a deficient number, since it is larger than the sum of its proper divisors (1).

904987 is an equidigital number, since it uses as much as digits as its factorization.

904987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 904987 is about 951.3080468492. The cubic root of 904987 is about 96.7269395549.

It can be divided in two parts, 904 and 987, that added together give a triangular number (1891 = T₆₁).

The spelling of 904987 in words is "nine hundred four thousand, nine hundred eighty-seven".