80990711 has 6 divisors (see below), whose sum is σ = 85478112. Its totient is φ = 76727700.

The previous prime is 80990699. The next prime is 80990719. The reversal of 80990711 is 11709908.

It is not a de Polignac number, because 80990711 - 2²² = 76796407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80990719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111815 + ... + 112536.

It is an arithmetic number, because the mean of its divisors is an integer number (14246352).

Almost surely, 2^80990711 is an apocalyptic number.

80990711 is a deficient number, since it is larger than the sum of its proper divisors (4487401).

80990711 is a wasteful number, since it uses less digits than its factorization.

80990711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224389 (or 224370 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 80990711 is about 8999.4839296484. The cubic root of 80990711 is about 432.6583308843.

The spelling of 80990711 in words is "eighty million, nine hundred ninety thousand, seven hundred eleven".