520214749 has 4 divisors (see below), whose sum is σ = 520269820. Its totient is φ = 520159680.

The previous prime is 520214743. The next prime is 520214777. The reversal of 520214749 is 947412025.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 332332900 + 187881849 = 18230^2 + 13707^2 .

It is a cyclic number.

It is not a de Polignac number, because 520214749 - 2¹⁷ = 520083677 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 (520214743) 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, 9372 + ... + 33589.

It is an arithmetic number, because the mean of its divisors is an integer number (130067455).

Almost surely, 2^520214749 is an apocalyptic number.

It is an amenable number.

520214749 is a deficient number, since it is larger than the sum of its proper divisors (55071).

520214749 is a wasteful number, since it uses less digits than its factorization.

520214749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55070.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 520214749 is about 22808.2166992512. The cubic root of 520214749 is about 804.2558347949.

The spelling of 520214749 in words is "five hundred twenty million, two hundred fourteen thousand, seven hundred forty-nine".