869291091 has 6 divisors (see below), whose sum is σ = 1255642700. Its totient is φ = 579527388.

The previous prime is 869291063. The next prime is 869291113. The reversal of 869291091 is 190192968.

It is not a de Polignac number, because 869291091 - 2¹⁰ = 869290067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869291051) 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, 48293941 + ... + 48293958.

Almost surely, 2^869291091 is an apocalyptic number.

869291091 is a deficient number, since it is larger than the sum of its proper divisors (386351609).

869291091 is a wasteful number, since it uses less digits than its factorization.

869291091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96587905 (or 96587902 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 869291091 is about 29483.7428254962. The cubic root of 869291091 is about 954.3809081093.

The spelling of 869291091 in words is "eight hundred sixty-nine million, two hundred ninety-one thousand, ninety-one".