654623 has 2 divisors, whose sum is σ = 654624. Its totient is φ = 654622.

The previous prime is 654613. The next prime is 654629. The reversal of 654623 is 326456.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 654592 and 654601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327311 + 327312.

It is an arithmetic number, because the mean of its divisors is an integer number (327312).

2⁶⁵⁴⁶²³ is an apocalyptic number.

654623 is a deficient number, since it is larger than the sum of its proper divisors (1).

654623 is an equidigital number, since it uses as much as digits as its factorization.

654623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 26.

The square root of 654623 is about 809.0877579101. The cubic root of 654623 is about 86.8287908768.

The spelling of 654623 in words is "six hundred fifty-four thousand, six hundred twenty-three".