514686721 has 2 divisors, whose sum is σ = 514686722. Its totient is φ = 514686720.

The previous prime is 514686691. The next prime is 514686727. The reversal of 514686721 is 127686415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 502880625 + 11806096 = 22425^2 + 3436^2 .

It is a cyclic number.

It is not a de Polignac number, because 514686721 - 2⁷ = 514686593 is a prime.

It is not a weakly prime, because it can be changed into another prime (514686727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257343360 + 257343361.

It is an arithmetic number, because the mean of its divisors is an integer number (257343361).

Almost surely, 2^514686721 is an apocalyptic number.

It is an amenable number.

514686721 is a deficient number, since it is larger than the sum of its proper divisors (1).

514686721 is an equidigital number, since it uses as much as digits as its factorization.

514686721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 514686721 is about 22686.7080247444. The cubic root of 514686721 is about 801.3968932959.

The spelling of 514686721 in words is "five hundred fourteen million, six hundred eighty-six thousand, seven hundred twenty-one".