511748879 has 4 divisors (see below), whose sum is σ = 515008584. Its totient is φ = 508489176.

The previous prime is 511748849. The next prime is 511748893. The reversal of 511748879 is 978847115.

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

It is a cyclic number.

It is not a de Polignac number, because 511748879 - 2¹⁶ = 511683343 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 (511748849) 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, 1629617 + ... + 1629930.

It is an arithmetic number, because the mean of its divisors is an integer number (128752146).

Almost surely, 2^511748879 is an apocalyptic number.

511748879 is a deficient number, since it is larger than the sum of its proper divisors (3259705).

511748879 is a wasteful number, since it uses less digits than its factorization.

511748879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3259704.

The product of its digits is 564480, while the sum is 50.

The square root of 511748879 is about 22621.8672748295. The cubic root of 511748879 is about 799.8691864234.

The spelling of 511748879 in words is "five hundred eleven million, seven hundred forty-eight thousand, eight hundred seventy-nine".