513980777 has 4 divisors (see below), whose sum is σ = 514031700. Its totient is φ = 513929856.

The previous prime is 513980773. The next prime is 513980821. The reversal of 513980777 is 777089315.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 777089315 = 5 ⋅155417863.

It can be written as a sum of positive squares in 2 ways, for example, as 150087001 + 363893776 = 12251^2 + 19076^2 .

It is a cyclic number.

It is not a de Polignac number, because 513980777 - 2² = 513980773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513980773) 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, 4652 + ... + 32397.

It is an arithmetic number, because the mean of its divisors is an integer number (128507925).

Almost surely, 2^513980777 is an apocalyptic number.

It is an amenable number.

513980777 is a deficient number, since it is larger than the sum of its proper divisors (50923).

513980777 is a wasteful number, since it uses less digits than its factorization.

513980777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50922.

The product of its (nonzero) digits is 370440, while the sum is 47.

The square root of 513980777 is about 22671.1441484544. The cubic root of 513980777 is about 801.0303271503.

The spelling of 513980777 in words is "five hundred thirteen million, nine hundred eighty thousand, seven hundred seventy-seven".