654716539 has 2 divisors, whose sum is σ = 654716540. Its totient is φ = 654716538.

The previous prime is 654716537. The next prime is 654716617. The reversal of 654716539 is 935617456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 654716539 - 2¹ = 654716537 is a prime.

Together with 654716537, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (654716537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327358269 + 327358270.

It is an arithmetic number, because the mean of its divisors is an integer number (327358270).

Almost surely, 2^654716539 is an apocalyptic number.

654716539 is a deficient number, since it is larger than the sum of its proper divisors (1).

654716539 is an equidigital number, since it uses as much as digits as its factorization.

654716539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 46.

The square root of 654716539 is about 25587.4293159747. The cubic root of 654716539 is about 868.3292633158.

It can be divided in two parts, 65471 and 6539, that added together give a triangular number (72010 = T₃₇₉).

The spelling of 654716539 in words is "six hundred fifty-four million, seven hundred sixteen thousand, five hundred thirty-nine".