77000845 has 4 divisors (see below), whose sum is σ = 92401020. Its totient is φ = 61600672.

The previous prime is 77000827. The next prime is 77000873. The reversal of 77000845 is 54800077.

It is a happy number.

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 35964009 + 41036836 = 5997^2 + 6406^2 .

It is a cyclic number.

It is not a de Polignac number, because 77000845 - 2⁷ = 77000717 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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, 7700080 + ... + 7700089.

It is an arithmetic number, because the mean of its divisors is an integer number (23100255).

Almost surely, 2^77000845 is an apocalyptic number.

It is an amenable number.

77000845 is a deficient number, since it is larger than the sum of its proper divisors (15400175).

77000845 is a wasteful number, since it uses less digits than its factorization.

77000845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15400174.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 77000845 is about 8775.0125356036. The cubic root of 77000845 is about 425.4336427401.

The spelling of 77000845 in words is "seventy-seven million, eight hundred forty-five", and thus it is an aban number.