846605991 has 32 divisors (see below), whose sum is σ = 1445395968. Its totient is φ = 427904640.

The previous prime is 846605983. The next prime is 846606017. The reversal of 846605991 is 199506648.

It is not a de Polignac number, because 846605991 - 2³ = 846605983 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 846605991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (846605911) 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 31 ways as a sum of consecutive naturals, for example, 40980 + ... + 58073.

It is an arithmetic number, because the mean of its divisors is an integer number (45168624).

Almost surely, 2^846605991 is an apocalyptic number.

846605991 is a deficient number, since it is larger than the sum of its proper divisors (598789977).

846605991 is a wasteful number, since it uses less digits than its factorization.

846605991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99111.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 846605991 is about 29096.4944795761. The cubic root of 846605991 is about 946.0057565574.

The spelling of 846605991 in words is "eight hundred forty-six million, six hundred five thousand, nine hundred ninety-one".