80109391 has 4 divisors (see below), whose sum is σ = 83592432. Its totient is φ = 76626352.

The previous prime is 80109373. The next prime is 80109401. The reversal of 80109391 is 19390108.

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

It is a cyclic number.

It is not a de Polignac number, because 80109391 - 2¹³ = 80101199 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80109331) 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, 1741486 + ... + 1741531.

It is an arithmetic number, because the mean of its divisors is an integer number (20898108).

Almost surely, 2^80109391 is an apocalyptic number.

80109391 is a deficient number, since it is larger than the sum of its proper divisors (3483041).

80109391 is a wasteful number, since it uses less digits than its factorization.

80109391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483040.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 80109391 is about 8950.3849637879. The cubic root of 80109391 is about 431.0832450286.

Adding to 80109391 its reverse (19390108), we get a palindrome (99499499).

The spelling of 80109391 in words is "eighty million, one hundred nine thousand, three hundred ninety-one".