863120091 has 8 divisors (see below), whose sum is σ = 1167035904. Its totient is φ = 567308840.

The previous prime is 863120081. The next prime is 863120143. The reversal of 863120091 is 190021368.

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

It is a cyclic number.

It is not a de Polignac number, because 863120091 - 2⁷ = 863119963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (863120021) 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 7 ways as a sum of consecutive naturals, for example, 2025891 + ... + 2026316.

It is an arithmetic number, because the mean of its divisors is an integer number (145879488).

Almost surely, 2^863120091 is an apocalyptic number.

863120091 is a deficient number, since it is larger than the sum of its proper divisors (303915813).

863120091 is a wasteful number, since it uses less digits than its factorization.

863120091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4052281.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 863120091 is about 29378.9055446250. The cubic root of 863120091 is about 952.1171953237.

The spelling of 863120091 in words is "eight hundred sixty-three million, one hundred twenty thousand, ninety-one".