80905911 has 8 divisors (see below), whose sum is σ = 111594480. Its totient is φ = 52077312.

The previous prime is 80905897. The next prime is 80905987. The reversal of 80905911 is 11950908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80905911 - 2⁵ = 80905879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80901911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464890 + ... + 465063.

It is an arithmetic number, because the mean of its divisors is an integer number (13949310).

Almost surely, 2^80905911 is an apocalyptic number.

80905911 is a deficient number, since it is larger than the sum of its proper divisors (30688569).

80905911 is a wasteful number, since it uses less digits than its factorization.

80905911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929985.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 80905911 is about 8994.7713144915. The cubic root of 80905911 is about 432.5072755411.

The spelling of 80905911 in words is "eighty million, nine hundred five thousand, nine hundred eleven".