80497191 has 4 divisors (see below), whose sum is σ = 107329592. Its totient is φ = 53664792.

The previous prime is 80497187. The next prime is 80497201. The reversal of 80497191 is 19179408.

It is a happy number.

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

It is not a de Polignac number, because 80497191 - 2² = 80497187 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 (80497121) 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, 13416196 + ... + 13416201.

It is an arithmetic number, because the mean of its divisors is an integer number (26832398).

Almost surely, 2^80497191 is an apocalyptic number.

80497191 is a deficient number, since it is larger than the sum of its proper divisors (26832401).

80497191 is a wasteful number, since it uses less digits than its factorization.

80497191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26832400.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 80497191 is about 8972.0226816477. The cubic root of 80497191 is about 431.7777330984. Note that the first 4 decimals are identical.

The spelling of 80497191 in words is "eighty million, four hundred ninety-seven thousand, one hundred ninety-one".