511394879 has 4 divisors (see below), whose sum is σ = 527891520. Its totient is φ = 494898240.

The previous prime is 511394813. The next prime is 511394881. The reversal of 511394879 is 978493115.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511394879 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 (511394809) 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, 8248274 + ... + 8248335.

It is an arithmetic number, because the mean of its divisors is an integer number (131972880).

Almost surely, 2^511394879 is an apocalyptic number.

511394879 is a deficient number, since it is larger than the sum of its proper divisors (16496641).

511394879 is a wasteful number, since it uses less digits than its factorization.

511394879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16496640.

The product of its digits is 272160, while the sum is 47.

The square root of 511394879 is about 22614.0416334630. The cubic root of 511394879 is about 799.6847085680.

The spelling of 511394879 in words is "five hundred eleven million, three hundred ninety-four thousand, eight hundred seventy-nine".