513665977 has 8 divisors (see below), whose sum is σ = 569861280. Its totient is φ = 459053760.

The previous prime is 513665947. The next prime is 513665989. The reversal of 513665977 is 779566315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 513665977 - 2¹¹ = 513663929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 513665977.

It is not an unprimeable number, because it can be changed into a prime (513665947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395088 + ... + 396385.

It is an arithmetic number, because the mean of its divisors is an integer number (71232660).

Almost surely, 2^513665977 is an apocalyptic number.

It is an amenable number.

513665977 is a deficient number, since it is larger than the sum of its proper divisors (56195303).

513665977 is a wasteful number, since it uses less digits than its factorization.

513665977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791543.

The product of its digits is 1190700, while the sum is 49.

The square root of 513665977 is about 22664.2003388604. The cubic root of 513665977 is about 800.8667569305.

The spelling of 513665977 in words is "five hundred thirteen million, six hundred sixty-five thousand, nine hundred seventy-seven".