531863869 has 4 divisors (see below), whose sum is σ = 549020800. Its totient is φ = 514706940.

The previous prime is 531863831. The next prime is 531863909. The reversal of 531863869 is 968368135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 531863869 - 2¹⁵ = 531831101 is a prime.

It is a super-2 number, since 2×531863869² = 565758350295298322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531863369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8578419 + ... + 8578480.

It is an arithmetic number, because the mean of its divisors is an integer number (137255200).

Almost surely, 2^531863869 is an apocalyptic number.

It is an amenable number.

531863869 is a deficient number, since it is larger than the sum of its proper divisors (17156931).

531863869 is a wasteful number, since it uses less digits than its factorization.

531863869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17156930.

The product of its digits is 933120, while the sum is 49.

The square root of 531863869 is about 23062.1739868556. The cubic root of 531863869 is about 810.2147827517.

The spelling of 531863869 in words is "five hundred thirty-one million, eight hundred sixty-three thousand, eight hundred sixty-nine".