513581879 has 2 divisors, whose sum is σ = 513581880. Its totient is φ = 513581878.

The previous prime is 513581833. The next prime is 513581897. The reversal of 513581879 is 978185315.

It is a happy number.

Together with next prime (513581897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513581879 - 2⁸ = 513581623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513581899) 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, 256790939 + 256790940.

It is an arithmetic number, because the mean of its divisors is an integer number (256790940).

Almost surely, 2^513581879 is an apocalyptic number.

513581879 is a deficient number, since it is larger than the sum of its proper divisors (1).

513581879 is an equidigital number, since it uses as much as digits as its factorization.

513581879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 47.

The square root of 513581879 is about 22662.3449581018. The cubic root of 513581879 is about 800.8230482616.

The spelling of 513581879 in words is "five hundred thirteen million, five hundred eighty-one thousand, eight hundred seventy-nine".