863117091 has 6 divisors (see below), whose sum is σ = 1246724700. Its totient is φ = 575411388.

The previous prime is 863117069. The next prime is 863117131. The reversal of 863117091 is 190711368.

863117091 is a `hidden beast` number, since 8 + 631 + 17 + 0 + 9 + 1 = 666.

It is not a de Polignac number, because 863117091 - 2¹³ = 863108899 is a prime.

It is a super-2 number, since 2×863117091² = 1489942225552604562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (863117011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47950941 + ... + 47950958.

It is an arithmetic number, because the mean of its divisors is an integer number (207787450).

Almost surely, 2^863117091 is an apocalyptic number.

863117091 is a deficient number, since it is larger than the sum of its proper divisors (383607609).

863117091 is a wasteful number, since it uses less digits than its factorization.

863117091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95901905 (or 95901902 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 863117091 is about 29378.8544875392. The cubic root of 863117091 is about 952.1160922115.

The spelling of 863117091 in words is "eight hundred sixty-three million, one hundred seventeen thousand, ninety-one".