654889 has 2 divisors, whose sum is σ = 654890. Its totient is φ = 654888.

The previous prime is 654877. The next prime is 654917. The reversal of 654889 is 988456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 652864 + 2025 = 808^2 + 45^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654889 is a prime.

It is not a weakly prime, because it can be changed into another prime (654839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327444 + 327445.

It is an arithmetic number, because the mean of its divisors is an integer number (327445).

2⁶⁵⁴⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

654889 is a deficient number, since it is larger than the sum of its proper divisors (1).

654889 is an equidigital number, since it uses as much as digits as its factorization.

654889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The square root of 654889 is about 809.2521238773. The cubic root of 654889 is about 86.8405499762.

The spelling of 654889 in words is "six hundred fifty-four thousand, eight hundred eighty-nine".