80197771 has 2 divisors, whose sum is σ = 80197772. Its totient is φ = 80197770.

The previous prime is 80197769. The next prime is 80197781. The reversal of 80197771 is 17779108.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80197771 - 2¹ = 80197769 is a prime.

Together with 80197769, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (80197751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40098885 + 40098886.

It is an arithmetic number, because the mean of its divisors is an integer number (40098886).

Almost surely, 2^80197771 is an apocalyptic number.

80197771 is a deficient number, since it is larger than the sum of its proper divisors (1).

80197771 is an equidigital number, since it uses as much as digits as its factorization.

80197771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696, while the sum is 40.

The square root of 80197771 is about 8955.3208206072. The cubic root of 80197771 is about 431.2417163990.

The spelling of 80197771 in words is "eighty million, one hundred ninety-seven thousand, seven hundred seventy-one".