513685877 has 2 divisors, whose sum is σ = 513685878. Its totient is φ = 513685876.

The previous prime is 513685873. The next prime is 513685883. The reversal of 513685877 is 778586315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 512841316 + 844561 = 22646^2 + 919^2 .

It is a cyclic number.

It is not a de Polignac number, because 513685877 - 2² = 513685873 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513685873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256842938 + 256842939.

It is an arithmetic number, because the mean of its divisors is an integer number (256842939).

Almost surely, 2^513685877 is an apocalyptic number.

It is an amenable number.

513685877 is a deficient number, since it is larger than the sum of its proper divisors (1).

513685877 is an equidigital number, since it uses as much as digits as its factorization.

513685877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1411200, while the sum is 50.

The square root of 513685877 is about 22664.6393529657. The cubic root of 513685877 is about 800.8770989578.

The spelling of 513685877 in words is "five hundred thirteen million, six hundred eighty-five thousand, eight hundred seventy-seven".