654123643 has 2 divisors, whose sum is σ = 654123644. Its totient is φ = 654123642.

The previous prime is 654123607. The next prime is 654123647. The reversal of 654123643 is 346321456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 654123643 - 2⁹ = 654123131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 654123599 and 654123608.

It is not a weakly prime, because it can be changed into another prime (654123647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327061821 + 327061822.

It is an arithmetic number, because the mean of its divisors is an integer number (327061822).

Almost surely, 2^654123643 is an apocalyptic number.

654123643 is a deficient number, since it is larger than the sum of its proper divisors (1).

654123643 is an equidigital number, since it uses as much as digits as its factorization.

654123643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 34.

The square root of 654123643 is about 25575.8410027901. The cubic root of 654123643 is about 868.0670712576.

The spelling of 654123643 in words is "six hundred fifty-four million, one hundred twenty-three thousand, six hundred forty-three".