80970817 has 4 divisors (see below), whose sum is σ = 81002196. Its totient is φ = 80939440.

The previous prime is 80970781. The next prime is 80970823. The reversal of 80970817 is 71807908.

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 9585216 + 71385601 = 3096^2 + 8449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80970817 is a prime.

It is a Smith number, since the sum of its digits (40) 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 self number, because there is not a number n which added to its sum of digits gives 80970817.

It is not an unprimeable number, because it can be changed into a prime (80970887) 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, 11434 + ... + 17107.

It is an arithmetic number, because the mean of its divisors is an integer number (20250549).

Almost surely, 2^80970817 is an apocalyptic number.

It is an amenable number.

80970817 is a deficient number, since it is larger than the sum of its proper divisors (31379).

80970817 is a wasteful number, since it uses less digits than its factorization.

80970817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31378.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 80970817 is about 8998.3785761658. The cubic root of 80970817 is about 432.6229029133.

The spelling of 80970817 in words is "eighty million, nine hundred seventy thousand, eight hundred seventeen".