8080781 has 2 divisors, whose sum is σ = 8080782. Its totient is φ = 8080780.

The previous prime is 8080777. The next prime is 8080789. The reversal of 8080781 is 1870808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4583881 + 3496900 = 2141^2 + 1870^2 .

It is a cyclic number.

It is not a de Polignac number, because 8080781 - 2² = 8080777 is a prime.

It is a super-2 number, since 2×8080781² = 130598043139922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8080789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4040390 + 4040391.

It is an arithmetic number, because the mean of its divisors is an integer number (4040391).

Almost surely, 2^8080781 is an apocalyptic number.

It is an amenable number.

8080781 is a deficient number, since it is larger than the sum of its proper divisors (1).

8080781 is an equidigital number, since it uses as much as digits as its factorization.

8080781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 8080781 is about 2842.6714548115. The cubic root of 8080781 is about 200.6709218030.

The spelling of 8080781 in words is "eight million, eighty thousand, seven hundred eighty-one".