511387 has 2 divisors, whose sum is σ = 511388. Its totient is φ = 511386.

The previous prime is 511361. The next prime is 511391. The reversal of 511387 is 783115.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511387 is a prime.

511387 is a lucky number.

It is equal to p₄₂₃₉₇ and since 511387 and 42397 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (511327) 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, 255693 + 255694.

It is an arithmetic number, because the mean of its divisors is an integer number (255694).

2⁵¹¹³⁸⁷ is an apocalyptic number.

511387 is a deficient number, since it is larger than the sum of its proper divisors (1).

511387 is an equidigital number, since it uses as much as digits as its factorization.

511387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 25.

The square root of 511387 is about 715.1132777400. The cubic root of 511387 is about 79.9680601665.

It can be divided in two parts, 511 and 387, that added together give a palindrome (898).

The spelling of 511387 in words is "five hundred eleven thousand, three hundred eighty-seven".