846989729 has 4 divisors (see below), whose sum is σ = 847047984. Its totient is φ = 846931476.

The previous prime is 846989701. The next prime is 846989753. The reversal of 846989729 is 927989648.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 846989729 - 2²⁰ = 845941153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (846989779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12794 + ... + 43100.

It is an arithmetic number, because the mean of its divisors is an integer number (211761996).

Almost surely, 2^846989729 is an apocalyptic number.

It is an amenable number.

846989729 is a deficient number, since it is larger than the sum of its proper divisors (58255).

846989729 is a wasteful number, since it uses less digits than its factorization.

846989729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58254.

The product of its digits is 15676416, while the sum is 62.

The square root of 846989729 is about 29103.0879633073. The cubic root of 846989729 is about 946.1486658236.

The spelling of 846989729 in words is "eight hundred forty-six million, nine hundred eighty-nine thousand, seven hundred twenty-nine".