512772391 has 2 divisors, whose sum is σ = 512772392. Its totient is φ = 512772390.

The previous prime is 512772371. The next prime is 512772401. The reversal of 512772391 is 193277215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 512772391 - 2⁷ = 512772263 is a prime.

It is equal to p_26992342 and since 512772391 and 26992342 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 512772391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512772341) 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, 256386195 + 256386196.

It is an arithmetic number, because the mean of its divisors is an integer number (256386196).

Almost surely, 2^512772391 is an apocalyptic number.

512772391 is a deficient number, since it is larger than the sum of its proper divisors (1).

512772391 is an equidigital number, since it uses as much as digits as its factorization.

512772391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 37.

The square root of 512772391 is about 22644.4781569371. The cubic root of 512772391 is about 800.4020848550.

The spelling of 512772391 in words is "five hundred twelve million, seven hundred seventy-two thousand, three hundred ninety-one".