80776693 has 4 divisors (see below), whose sum is σ = 81112108. Its totient is φ = 80441280.

The previous prime is 80776643. The next prime is 80776721. The reversal of 80776693 is 39667708.

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 72897444 + 7879249 = 8538^2 + 2807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80776693 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 (80776603) 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, 167346 + ... + 167827.

It is an arithmetic number, because the mean of its divisors is an integer number (20278027).

Almost surely, 2^80776693 is an apocalyptic number.

It is an amenable number.

80776693 is a deficient number, since it is larger than the sum of its proper divisors (335415).

80776693 is a wasteful number, since it uses less digits than its factorization.

80776693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335414.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 80776693 is about 8987.5854933347. The cubic root of 80776693 is about 432.2768947430.

The spelling of 80776693 in words is "eighty million, seven hundred seventy-six thousand, six hundred ninety-three".