527378821 has 4 divisors (see below), whose sum is σ = 527428044. Its totient is φ = 527329600.

The previous prime is 527378807. The next prime is 527378827. The reversal of 527378821 is 128873725.

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 299670721 + 227708100 = 17311^2 + 15090^2 .

It is a cyclic number.

It is not a de Polignac number, because 527378821 - 2⁹ = 527378309 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 (527378827) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 970 + ... + 32491.

It is an arithmetic number, because the mean of its divisors is an integer number (131857011).

Almost surely, 2^527378821 is an apocalyptic number.

It is an amenable number.

527378821 is a deficient number, since it is larger than the sum of its proper divisors (49223).

527378821 is a wasteful number, since it uses less digits than its factorization.

527378821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49222.

The product of its digits is 188160, while the sum is 43.

The square root of 527378821 is about 22964.7299352725. The cubic root of 527378821 is about 807.9309184518.

The spelling of 527378821 in words is "five hundred twenty-seven million, three hundred seventy-eight thousand, eight hundred twenty-one".