513963887 has 4 divisors (see below), whose sum is σ = 515616816. Its totient is φ = 512310960.

The previous prime is 513963881. The next prime is 513963913. The reversal of 513963887 is 788369315.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788369315 = 5 ⋅157673863.

It is a cyclic number.

It is not a de Polignac number, because 513963887 - 2¹² = 513959791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513963881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825998 + ... + 826619.

It is an arithmetic number, because the mean of its divisors is an integer number (128904204).

Almost surely, 2^513963887 is an apocalyptic number.

513963887 is a deficient number, since it is larger than the sum of its proper divisors (1652929).

513963887 is a wasteful number, since it uses less digits than its factorization.

513963887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652928.

The product of its digits is 1088640, while the sum is 50.

The square root of 513963887 is about 22670.7716454469. The cubic root of 513963887 is about 801.0215527946.

The spelling of 513963887 in words is "five hundred thirteen million, nine hundred sixty-three thousand, eight hundred eighty-seven".