513947377 has 4 divisors (see below), whose sum is σ = 520453120. Its totient is φ = 507441636.

The previous prime is 513947347. The next prime is 513947381. The reversal of 513947377 is 773749315.

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.

It is a cyclic number.

It is not a de Polignac number, because 513947377 - 2⁷ = 513947249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513947327) 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, 3252753 + ... + 3252910.

It is an arithmetic number, because the mean of its divisors is an integer number (130113280).

Almost surely, 2^513947377 is an apocalyptic number.

It is an amenable number.

513947377 is a deficient number, since it is larger than the sum of its proper divisors (6505743).

513947377 is an equidigital number, since it uses as much as digits as its factorization.

513947377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6505742.

The product of its digits is 555660, while the sum is 46.

The square root of 513947377 is about 22670.4075172900. The cubic root of 513947377 is about 801.0129756632.

The spelling of 513947377 in words is "five hundred thirteen million, nine hundred forty-seven thousand, three hundred seventy-seven".