80911349 has 4 divisors (see below), whose sum is σ = 80992236. Its totient is φ = 80830464.

The previous prime is 80911339. The next prime is 80911351. The reversal of 80911349 is 94311908.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2464900 + 78446449 = 1570^2 + 8857^2 .

It is a cyclic number.

It is not a de Polignac number, because 80911349 - 2⁸ = 80911093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80911339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38924 + ... + 40949.

It is an arithmetic number, because the mean of its divisors is an integer number (20248059).

Almost surely, 2^80911349 is an apocalyptic number.

It is an amenable number.

80911349 is a deficient number, since it is larger than the sum of its proper divisors (80887).

80911349 is a wasteful number, since it uses less digits than its factorization.

80911349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80886.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 80911349 is about 8995.0735961414. The cubic root of 80911349 is about 432.5169654877.

The spelling of 80911349 in words is "eighty million, nine hundred eleven thousand, three hundred forty-nine".