516097921 has 2 divisors, whose sum is σ = 516097922. Its totient is φ = 516097920.

The previous prime is 516097919. The next prime is 516097927. The reversal of 516097921 is 129790615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274730625 + 241367296 = 16575^2 + 15536^2 .

It is a cyclic number.

It is not a de Polignac number, because 516097921 - 2¹ = 516097919 is a prime.

Together with 516097919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (516097927) 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, 258048960 + 258048961.

It is an arithmetic number, because the mean of its divisors is an integer number (258048961).

Almost surely, 2^516097921 is an apocalyptic number.

It is an amenable number.

516097921 is a deficient number, since it is larger than the sum of its proper divisors (1).

516097921 is an equidigital number, since it uses as much as digits as its factorization.

516097921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 516097921 is about 22717.7886467851. The cubic root of 516097921 is about 802.1286648131.

The spelling of 516097921 in words is "five hundred sixteen million, ninety-seven thousand, nine hundred twenty-one".