80409697 has 2 divisors, whose sum is σ = 80409698. Its totient is φ = 80409696.

The previous prime is 80409671. The next prime is 80409709. The reversal of 80409697 is 79690408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78216336 + 2193361 = 8844^2 + 1481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80409697 is a prime.

It is not a weakly prime, because it can be changed into another prime (80409617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40204848 + 40204849.

It is an arithmetic number, because the mean of its divisors is an integer number (40204849).

Almost surely, 2^80409697 is an apocalyptic number.

It is an amenable number.

80409697 is a deficient number, since it is larger than the sum of its proper divisors (1).

80409697 is an equidigital number, since it uses as much as digits as its factorization.

80409697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 80409697 is about 8967.1454209241. The cubic root of 80409697 is about 431.6212404473.

The spelling of 80409697 in words is "eighty million, four hundred nine thousand, six hundred ninety-seven".