511929989 has 2 divisors, whose sum is σ = 511929990. Its totient is φ = 511929988.

The previous prime is 511929941. The next prime is 511930019. The reversal of 511929989 is 989929115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 465825889 + 46104100 = 21583^2 + 6790^2 .

It is a cyclic number.

It is not a de Polignac number, because 511929989 - 2¹⁶ = 511864453 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 511929989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511929919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255964994 + 255964995.

It is an arithmetic number, because the mean of its divisors is an integer number (255964995).

Almost surely, 2^511929989 is an apocalyptic number.

It is an amenable number.

511929989 is a deficient number, since it is larger than the sum of its proper divisors (1).

511929989 is an equidigital number, since it uses as much as digits as its factorization.

511929989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 53.

The square root of 511929989 is about 22625.8699059285. The cubic root of 511929989 is about 799.9635342753.

The spelling of 511929989 in words is "five hundred eleven million, nine hundred twenty-nine thousand, nine hundred eighty-nine".