80097779 has 2 divisors, whose sum is σ = 80097780. Its totient is φ = 80097778.

The previous prime is 80097737. The next prime is 80097793. The reversal of 80097779 is 97779008.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80097779 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80097079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40048889 + 40048890.

It is an arithmetic number, because the mean of its divisors is an integer number (40048890).

Almost surely, 2^80097779 is an apocalyptic number.

80097779 is a deficient number, since it is larger than the sum of its proper divisors (1).

80097779 is an equidigital number, since it uses as much as digits as its factorization.

80097779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 47.

The square root of 80097779 is about 8949.7362530971. The cubic root of 80097779 is about 431.0624152588.

The spelling of 80097779 in words is "eighty million, ninety-seven thousand, seven hundred seventy-nine".