516918973 has 2 divisors, whose sum is σ = 516918974. Its totient is φ = 516918972.

The previous prime is 516918943. The next prime is 516918989. The reversal of 516918973 is 379819615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 472323289 + 44595684 = 21733^2 + 6678^2 .

It is a cyclic number.

It is not a de Polignac number, because 516918973 - 2²¹ = 514821821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (516918943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258459486 + 258459487.

It is an arithmetic number, because the mean of its divisors is an integer number (258459487).

Almost surely, 2^516918973 is an apocalyptic number.

It is an amenable number.

516918973 is a deficient number, since it is larger than the sum of its proper divisors (1).

516918973 is an equidigital number, since it uses as much as digits as its factorization.

516918973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 49.

The square root of 516918973 is about 22735.8521502934. The cubic root of 516918973 is about 802.5538040355.

It can be divided in two parts, 5169 and 18973, that added together give a palindrome (24142).

The spelling of 516918973 in words is "five hundred sixteen million, nine hundred eighteen thousand, nine hundred seventy-three".