863649233 has 4 divisors (see below), whose sum is σ = 869953380. Its totient is φ = 857345088.

The previous prime is 863649223. The next prime is 863649247. The reversal of 863649233 is 332946368.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 465566929 + 398082304 = 21577^2 + 19952^2 .

It is a cyclic number.

It is not a de Polignac number, because 863649233 - 2¹⁰ = 863648209 is a prime.

It is a super-2 number, since 2×863649233² = 1491779995322976578, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (863649223) 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, 3151868 + ... + 3152141.

It is an arithmetic number, because the mean of its divisors is an integer number (217488345).

Almost surely, 2^863649233 is an apocalyptic number.

It is an amenable number.

863649233 is a deficient number, since it is larger than the sum of its proper divisors (6304147).

863649233 is a wasteful number, since it uses less digits than its factorization.

863649233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6304146.

The product of its digits is 559872, while the sum is 44.

The square root of 863649233 is about 29387.9096398502. The cubic root of 863649233 is about 952.3117230159.

The spelling of 863649233 in words is "eight hundred sixty-three million, six hundred forty-nine thousand, two hundred thirty-three".