513103387 has 4 divisors (see below), whose sum is σ = 514025136. Its totient is φ = 512181640.

The previous prime is 513103373. The next prime is 513103411. The reversal of 513103387 is 783301315.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513103387 - 2¹¹ = 513101339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513106387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460039 + ... + 461152.

It is an arithmetic number, because the mean of its divisors is an integer number (128506284).

Almost surely, 2^513103387 is an apocalyptic number.

513103387 is a deficient number, since it is larger than the sum of its proper divisors (921749).

513103387 is an equidigital number, since it uses as much as digits as its factorization.

513103387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921748.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 513103387 is about 22651.7855146123. The cubic root of 513103387 is about 800.5742684003.

The spelling of 513103387 in words is "five hundred thirteen million, one hundred three thousand, three hundred eighty-seven".