80971641 has 6 divisors (see below), whose sum is σ = 116959050. Its totient is φ = 53981088.

The previous prime is 80971613. The next prime is 80971643. The reversal of 80971641 is 14617908.

80971641 is a `hidden beast` number, since 8 + 0 + 9 + 7 + 1 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 50765625 + 30206016 = 7125^2 + 5496^2 .

It is not a de Polignac number, because 80971641 - 2⁵ = 80971609 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 80971596 and 80971605.

It is not an unprimeable number, because it can be changed into a prime (80971643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4498416 + ... + 4498433.

It is an arithmetic number, because the mean of its divisors is an integer number (19493175).

Almost surely, 2^80971641 is an apocalyptic number.

It is an amenable number.

80971641 is a deficient number, since it is larger than the sum of its proper divisors (35987409).

80971641 is a wasteful number, since it uses less digits than its factorization.

80971641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8996855 (or 8996852 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 80971641 is about 8998.4243620758. The cubic root of 80971641 is about 432.6243704382.

The spelling of 80971641 in words is "eighty million, nine hundred seventy-one thousand, six hundred forty-one".