506608691 has 2 divisors, whose sum is σ = 506608692. Its totient is φ = 506608690.

The previous prime is 506608651. The next prime is 506608703. The reversal of 506608691 is 196806605.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-506608691 is a prime.

It is not a weakly prime, because it can be changed into another prime (506608651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253304345 + 253304346.

It is an arithmetic number, because the mean of its divisors is an integer number (253304346).

Almost surely, 2^506608691 is an apocalyptic number.

506608691 is a deficient number, since it is larger than the sum of its proper divisors (1).

506608691 is an equidigital number, since it uses as much as digits as its factorization.

506608691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 506608691 is about 22507.9694997128. The cubic root of 506608691 is about 797.1821126046.

The spelling of 506608691 in words is "five hundred six million, six hundred eight thousand, six hundred ninety-one".