80700649 has 12 divisors (see below), whose sum is σ = 88692300. Its totient is φ = 73326848.

The previous prime is 80700647. The next prime is 80700673. The reversal of 80700649 is 94600708.

It can be written as a sum of positive squares in 6 ways, for example, as 29506624 + 51194025 = 5432^2 + 7155^2 .

It is not a de Polignac number, because 80700649 - 2¹ = 80700647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80700647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3567 + ... + 13195.

It is an arithmetic number, because the mean of its divisors is an integer number (7391025).

Almost surely, 2^80700649 is an apocalyptic number.

It is an amenable number.

80700649 is a deficient number, since it is larger than the sum of its proper divisors (7991651).

80700649 is a wasteful number, since it uses less digits than its factorization.

80700649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9692 (or 9675 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 80700649 is about 8983.3539950288. The cubic root of 80700649 is about 432.1412021988.

The spelling of 80700649 in words is "eighty million, seven hundred thousand, six hundred forty-nine".