80970509 has 8 divisors (see below), whose sum is σ = 82112760. Its totient is φ = 79833600.

The previous prime is 80970503. The next prime is 80970521. The reversal of 80970509 is 90507908.

It can be written as a sum of positive squares in 4 ways, for example, as 366025 + 80604484 = 605^2 + 8978^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80970509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80970503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36389 + ... + 38549.

It is an arithmetic number, because the mean of its divisors is an integer number (10264095).

Almost surely, 2^80970509 is an apocalyptic number.

80970509 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

80970509 is a deficient number, since it is larger than the sum of its proper divisors (1142251).

80970509 is a wasteful number, since it uses less digits than its factorization.

80970509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 80970509 is about 8998.3614619552. The cubic root of 80970509 is about 432.6223543699.

The spelling of 80970509 in words is "eighty million, nine hundred seventy thousand, five hundred nine".