80775971 has 2 divisors, whose sum is σ = 80775972. Its totient is φ = 80775970.

The previous prime is 80775967. The next prime is 80775983. The reversal of 80775971 is 17957708.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80775971 - 2² = 80775967 is a prime.

It is not a weakly prime, because it can be changed into another prime (80775901) 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, 40387985 + 40387986.

It is an arithmetic number, because the mean of its divisors is an integer number (40387986).

Almost surely, 2^80775971 is an apocalyptic number.

80775971 is a deficient number, since it is larger than the sum of its proper divisors (1).

80775971 is an equidigital number, since it uses as much as digits as its factorization.

80775971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 123480, while the sum is 44.

The square root of 80775971 is about 8987.5453267285. The cubic root of 80775971 is about 432.2756068102.

The spelling of 80775971 in words is "eighty million, seven hundred seventy-five thousand, nine hundred seventy-one".