845688829 has 4 divisors (see below), whose sum is σ = 861645276. Its totient is φ = 829732384.

The previous prime is 845688827. The next prime is 845688839. The reversal of 845688829 is 928886548.

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

It can be written as a sum of positive squares in 2 ways, for example, as 660592804 + 185096025 = 25702^2 + 13605^2 .

It is not a de Polignac number, because 845688829 - 2¹ = 845688827 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845688827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7978144 + ... + 7978249.

It is an arithmetic number, because the mean of its divisors is an integer number (215411319).

Almost surely, 2^845688829 is an apocalyptic number.

It is an amenable number.

845688829 is a deficient number, since it is larger than the sum of its proper divisors (15956447).

845688829 is a wasteful number, since it uses less digits than its factorization.

845688829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15956446.

The product of its digits is 8847360, while the sum is 58.

The square root of 845688829 is about 29080.7295128578. The cubic root of 845688829 is about 945.6640178792.

The spelling of 845688829 in words is "eight hundred forty-five million, six hundred eighty-eight thousand, eight hundred twenty-nine".