530887681 has 3 divisors (see below), whose sum is σ = 530910723. Its totient is φ = 530864640.

The previous prime is 530887667. The next prime is 530887733. The reversal of 530887681 is 186788035.

The square root of 530887681 is 23041.

It is a perfect power (a square), and thus also a powerful number.

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 only one way, i.e., 104878081 + 426009600 = 10241^2 + 20640^2 .

It is a de Polignac number, because none of the positive numbers 2^k-530887681 is a prime.

It is a super-2 number, since 2×530887681² = 563683459675115522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (530887381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11521 + ... + 34561.

It is an arithmetic number, because the mean of its divisors is an integer number (176970241).

Almost surely, 2^530887681 is an apocalyptic number.

530887681 is the 23041-st square number.

530887681 is the 11521-st centered octagonal number.

It is an amenable number.

530887681 is a deficient number, since it is larger than the sum of its proper divisors (23042).

530887681 is an frugal number, since it uses more digits than its factorization.

530887681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46082 (or 23041 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The cubic root of 530887681 is about 809.7187872054.

The spelling of 530887681 in words is "five hundred thirty million, eight hundred eighty-seven thousand, six hundred eighty-one".