512640853 has 4 divisors (see below), whose sum is σ = 514491820. Its totient is φ = 510789888.

The previous prime is 512640851. The next prime is 512640901. The reversal of 512640853 is 358046215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 358046215 = 5 ⋅71609243.

It can be written as a sum of positive squares in 2 ways, for example, as 351300049 + 161340804 = 18743^2 + 12702^2 .

It is a cyclic number.

It is not a de Polignac number, because 512640853 - 2¹ = 512640851 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 (512640851) 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, 925068 + ... + 925621.

It is an arithmetic number, because the mean of its divisors is an integer number (128622955).

Almost surely, 2^512640853 is an apocalyptic number.

It is an amenable number.

512640853 is a deficient number, since it is larger than the sum of its proper divisors (1850967).

512640853 is a wasteful number, since it uses less digits than its factorization.

512640853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850966.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 512640853 is about 22641.5735539737. The cubic root of 512640853 is about 800.3336384416. Note that the first 3 decimals are identical.

The spelling of 512640853 in words is "five hundred twelve million, six hundred forty thousand, eight hundred fifty-three".