80540797 has 4 divisors (see below), whose sum is σ = 80831836. Its totient is φ = 80249760.

The previous prime is 80540783. The next prime is 80540807. The reversal of 80540797 is 79704508.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6081156 + 74459641 = 2466^2 + 8629^2 .

It is a cyclic number.

It is not a de Polignac number, because 80540797 - 2¹¹ = 80538749 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 (80540777) 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, 145104 + ... + 145657.

It is an arithmetic number, because the mean of its divisors is an integer number (20207959).

Almost surely, 2^80540797 is an apocalyptic number.

It is an amenable number.

80540797 is a deficient number, since it is larger than the sum of its proper divisors (291039).

80540797 is a wasteful number, since it uses less digits than its factorization.

80540797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291038.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 80540797 is about 8974.4524624068. The cubic root of 80540797 is about 431.8556848912.

The spelling of 80540797 in words is "eighty million, five hundred forty thousand, seven hundred ninety-seven".