515664947 has 8 divisors (see below), whose sum is σ = 589741152. Its totient is φ = 441691200.

The previous prime is 515664937. The next prime is 515664949. The reversal of 515664947 is 749466515.

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

It is a cyclic number.

It is not a de Polignac number, because 515664947 - 2¹⁶ = 515599411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (515664949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14504 + ... + 35237.

It is an arithmetic number, because the mean of its divisors is an integer number (73717644).

Almost surely, 2^515664947 is an apocalyptic number.

515664947 is a deficient number, since it is larger than the sum of its proper divisors (74076205).

515664947 is a wasteful number, since it uses less digits than its factorization.

515664947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51229.

The product of its digits is 907200, while the sum is 47.

The square root of 515664947 is about 22708.2572426860. The cubic root of 515664947 is about 801.9042900650.

The spelling of 515664947 in words is "five hundred fifteen million, six hundred sixty-four thousand, nine hundred forty-seven".