509680651 has 2 divisors, whose sum is σ = 509680652. Its totient is φ = 509680650.

The previous prime is 509680649. The next prime is 509680657. The reversal of 509680651 is 156086905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 509680651 - 2¹ = 509680649 is a prime.

Together with 509680649, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (509680657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254840325 + 254840326.

It is an arithmetic number, because the mean of its divisors is an integer number (254840326).

Almost surely, 2^509680651 is an apocalyptic number.

509680651 is a deficient number, since it is larger than the sum of its proper divisors (1).

509680651 is an equidigital number, since it uses as much as digits as its factorization.

509680651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 509680651 is about 22576.1079683811. The cubic root of 509680651 is about 798.7901770620.

It can be divided in two parts, 509680 and 651, that multiplied together give a triangular number (331801680 = T₂₅₇₆₀).

The spelling of 509680651 in words is "five hundred nine million, six hundred eighty thousand, six hundred fifty-one".