654543247 has 2 divisors, whose sum is σ = 654543248. Its totient is φ = 654543246.

The previous prime is 654543193. The next prime is 654543257. The reversal of 654543247 is 742345456.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654543247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654543257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327271623 + 327271624.

It is an arithmetic number, because the mean of its divisors is an integer number (327271624).

Almost surely, 2^654543247 is an apocalyptic number.

654543247 is a deficient number, since it is larger than the sum of its proper divisors (1).

654543247 is an equidigital number, since it uses as much as digits as its factorization.

654543247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 40.

The square root of 654543247 is about 25584.0428196952. The cubic root of 654543247 is about 868.2526460402.

The spelling of 654543247 in words is "six hundred fifty-four million, five hundred forty-three thousand, two hundred forty-seven".