80677691 has 2 divisors, whose sum is σ = 80677692. Its totient is φ = 80677690.

The previous prime is 80677687. The next prime is 80677693. The reversal of 80677691 is 19677608.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80677691 - 2² = 80677687 is a prime.

Together with 80677693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80677693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40338845 + 40338846.

It is an arithmetic number, because the mean of its divisors is an integer number (40338846).

Almost surely, 2^80677691 is an apocalyptic number.

80677691 is a deficient number, since it is larger than the sum of its proper divisors (1).

80677691 is an equidigital number, since it uses as much as digits as its factorization.

80677691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 80677691 is about 8982.0760963154. The cubic root of 80677691 is about 432.1002193039.

The spelling of 80677691 in words is "eighty million, six hundred seventy-seven thousand, six hundred ninety-one".