80111711 has 2 divisors, whose sum is σ = 80111712. Its totient is φ = 80111710.

The previous prime is 80111693. The next prime is 80111723. The reversal of 80111711 is 11711108.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80111711 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80111741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40055855 + 40055856.

It is an arithmetic number, because the mean of its divisors is an integer number (40055856).

Almost surely, 2^80111711 is an apocalyptic number.

80111711 is a deficient number, since it is larger than the sum of its proper divisors (1).

80111711 is an equidigital number, since it uses as much as digits as its factorization.

80111711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 20.

The square root of 80111711 is about 8950.5145662135. The cubic root of 80111711 is about 431.0874064362.

Adding to 80111711 its reverse (11711108), we get a palindrome (91822819).

The spelling of 80111711 in words is "eighty million, one hundred eleven thousand, seven hundred eleven".