80961191 has 8 divisors (see below), whose sum is σ = 85891824. Its totient is φ = 76049280.

The previous prime is 80961187. The next prime is 80961197. The reversal of 80961191 is 19116908.

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

It is a cyclic number.

It is not a de Polignac number, because 80961191 - 2² = 80961187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80961197) 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, 4796 + ... + 13598.

It is an arithmetic number, because the mean of its divisors is an integer number (10736478).

Almost surely, 2^80961191 is an apocalyptic number.

80961191 is a deficient number, since it is larger than the sum of its proper divisors (4930633).

80961191 is a wasteful number, since it uses less digits than its factorization.

80961191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9361.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 80961191 is about 8997.8436861284. The cubic root of 80961191 is about 432.6057584933.

The spelling of 80961191 in words is "eighty million, nine hundred sixty-one thousand, one hundred ninety-one".