513838477 has 4 divisors (see below), whose sum is σ = 521507776. Its totient is φ = 506169180.

The previous prime is 513838471. The next prime is 513838483. The reversal of 513838477 is 774838315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 774838315 = 5 ⋅154967663.

It is an interprime number because it is at equal distance from previous prime (513838471) and next prime (513838483).

It is a cyclic number.

It is not a de Polignac number, because 513838477 - 2¹¹ = 513836429 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 (513838471) 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, 3834549 + ... + 3834682.

It is an arithmetic number, because the mean of its divisors is an integer number (130376944).

Almost surely, 2^513838477 is an apocalyptic number.

It is an amenable number.

513838477 is a deficient number, since it is larger than the sum of its proper divisors (7669299).

513838477 is an equidigital number, since it uses as much as digits as its factorization.

513838477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7669298.

The product of its digits is 564480, while the sum is 46.

The square root of 513838477 is about 22668.0055805534. The cubic root of 513838477 is about 800.9563962812.

The spelling of 513838477 in words is "five hundred thirteen million, eight hundred thirty-eight thousand, four hundred seventy-seven".