863261913 has 8 divisors (see below), whose sum is σ = 1155172288. Its totient is φ = 573429744.

The previous prime is 863261909. The next prime is 863261947. The reversal of 863261913 is 319162368.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 863261913 - 2² = 863261909 is a prime.

It is a super-2 number, since 2×863261913² = 1490442260872839138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863261963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518581 + ... + 520242.

It is an arithmetic number, because the mean of its divisors is an integer number (144396536).

Almost surely, 2^863261913 is an apocalyptic number.

It is an amenable number.

863261913 is a deficient number, since it is larger than the sum of its proper divisors (291910375).

863261913 is a wasteful number, since it uses less digits than its factorization.

863261913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039103.

The product of its digits is 46656, while the sum is 39.

The square root of 863261913 is about 29381.3191160642. The cubic root of 863261913 is about 952.1693409332.

The spelling of 863261913 in words is "eight hundred sixty-three million, two hundred sixty-one thousand, nine hundred thirteen".