863724131 has 4 divisors (see below), whose sum is σ = 864865872. Its totient is φ = 862582392.

The previous prime is 863724119. The next prime is 863724133. The reversal of 863724131 is 131427368.

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 863724131 - 2¹⁸ = 863461987 is a prime.

It is a super-2 number, since 2×863724131² = 1492038748943410322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 863724091 and 863724100.

It is not an unprimeable number, because it can be changed into a prime (863724133) 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, 569735 + ... + 571248.

It is an arithmetic number, because the mean of its divisors is an integer number (216216468).

Almost surely, 2^863724131 is an apocalyptic number.

863724131 is a deficient number, since it is larger than the sum of its proper divisors (1141741).

863724131 is a wasteful number, since it uses less digits than its factorization.

863724131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141740.

The product of its digits is 24192, while the sum is 35.

The square root of 863724131 is about 29389.1839117727. The cubic root of 863724131 is about 952.3392512372.

It can be divided in two parts, 8637 and 24131, that added together give a 15-th power (32768 = 2¹⁵).

The spelling of 863724131 in words is "eight hundred sixty-three million, seven hundred twenty-four thousand, one hundred thirty-one".