80140591 has 4 divisors (see below), whose sum is σ = 80159184. Its totient is φ = 80122000.

The previous prime is 80140561. The next prime is 80140597. The reversal of 80140591 is 19504108.

It is a happy number.

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 80140591 - 2⁵ = 80140559 is a prime.

It is a super-3 number, since 3×80140591³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80140597) 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, 891 + ... + 12691.

It is an arithmetic number, because the mean of its divisors is an integer number (20039796).

Almost surely, 2^80140591 is an apocalyptic number.

80140591 is a deficient number, since it is larger than the sum of its proper divisors (18593).

80140591 is a wasteful number, since it uses less digits than its factorization.

80140591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18592.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 80140591 is about 8952.1277359073. The cubic root of 80140591 is about 431.1392020617.

Adding to 80140591 its reverse (19504108), we get a palindrome (99644699).

The spelling of 80140591 in words is "eighty million, one hundred forty thousand, five hundred ninety-one".