512863394 has 4 divisors (see below), whose sum is σ = 769295094. Its totient is φ = 256431696.

The previous prime is 512863343. The next prime is 512863399. The reversal of 512863394 is 493368215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 409536169 + 103327225 = 20237^2 + 10165^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (512863399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128215847 + ... + 128215850.

Almost surely, 2^512863394 is an apocalyptic number.

512863394 is a deficient number, since it is larger than the sum of its proper divisors (256431700).

512863394 is a wasteful number, since it uses less digits than its factorization.

512863394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256431699.

The product of its digits is 155520, while the sum is 41.

The square root of 512863394 is about 22646.4874539077. The cubic root of 512863394 is about 800.4494318415.

The spelling of 512863394 in words is "five hundred twelve million, eight hundred sixty-three thousand, three hundred ninety-four".