869459691 has 4 divisors (see below), whose sum is σ = 1159279592. Its totient is φ = 579639792.

The previous prime is 869459671. The next prime is 869459729. The reversal of 869459691 is 196954968.

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

It is not a de Polignac number, because 869459691 - 2⁵ = 869459659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869459641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144909946 + ... + 144909951.

It is an arithmetic number, because the mean of its divisors is an integer number (289819898).

Almost surely, 2^869459691 is an apocalyptic number.

869459691 is a deficient number, since it is larger than the sum of its proper divisors (289819901).

869459691 is a wasteful number, since it uses less digits than its factorization.

869459691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289819900.

The product of its digits is 4199040, while the sum is 57.

The square root of 869459691 is about 29486.6018896719. The cubic root of 869459691 is about 954.4426052098.

The spelling of 869459691 in words is "eight hundred sixty-nine million, four hundred fifty-nine thousand, six hundred ninety-one".