516738394 has 4 divisors (see below), whose sum is σ = 775107594. Its totient is φ = 258369196.

The previous prime is 516738379. The next prime is 516738403. The reversal of 516738394 is 493837615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493837615 = 5 ⋅98767523.

It can be written as a sum of positive squares in only one way, i.e., 315524169 + 201214225 = 17763^2 + 14185^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 129184597 + ... + 129184600.

Almost surely, 2^516738394 is an apocalyptic number.

516738394 is a deficient number, since it is larger than the sum of its proper divisors (258369200).

516738394 is a wasteful number, since it uses less digits than its factorization.

516738394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258369199.

The product of its digits is 544320, while the sum is 46.

The square root of 516738394 is about 22731.8805645288. The cubic root of 516738394 is about 802.4603391986.

The spelling of 516738394 in words is "five hundred sixteen million, seven hundred thirty-eight thousand, three hundred ninety-four".