80625691 has 2 divisors, whose sum is σ = 80625692. Its totient is φ = 80625690.

The previous prime is 80625659. The next prime is 80625707. The reversal of 80625691 is 19652608.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80625691 - 2⁵ = 80625659 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80625691.

It is not a weakly prime, because it can be changed into another prime (80625641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40312845 + 40312846.

It is an arithmetic number, because the mean of its divisors is an integer number (40312846).

Almost surely, 2^80625691 is an apocalyptic number.

80625691 is a deficient number, since it is larger than the sum of its proper divisors (1).

80625691 is an equidigital number, since it uses as much as digits as its factorization.

80625691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 80625691 is about 8979.1809760133. The cubic root of 80625691 is about 432.0073640577.

The spelling of 80625691 in words is "eighty million, six hundred twenty-five thousand, six hundred ninety-one".