654679 has 2 divisors, whose sum is σ = 654680. Its totient is φ = 654678.

The previous prime is 654671. The next prime is 654697. The reversal of 654679 is 976456.

Together with next prime (654697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 654679 - 2³ = 654671 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327339 + 327340.

It is an arithmetic number, because the mean of its divisors is an integer number (327340).

2⁶⁵⁴⁶⁷⁹ is an apocalyptic number.

654679 is a deficient number, since it is larger than the sum of its proper divisors (1).

654679 is an equidigital number, since it uses as much as digits as its factorization.

654679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 654679 is about 809.1223640464. The cubic root of 654679 is about 86.8312667413.

The spelling of 654679 in words is "six hundred fifty-four thousand, six hundred seventy-nine".