80684993 has 2 divisors, whose sum is σ = 80684994. Its totient is φ = 80684992.

The previous prime is 80684987. The next prime is 80685023. The reversal of 80684993 is 39948608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57577744 + 23107249 = 7588^2 + 4807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80684993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80614993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40342496 + 40342497.

It is an arithmetic number, because the mean of its divisors is an integer number (40342497).

Almost surely, 2^80684993 is an apocalyptic number.

It is an amenable number.

80684993 is a deficient number, since it is larger than the sum of its proper divisors (1).

80684993 is an equidigital number, since it uses as much as digits as its factorization.

80684993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 80684993 is about 8982.4825633006. The cubic root of 80684993 is about 432.1132551282.

The spelling of 80684993 in words is "eighty million, six hundred eighty-four thousand, nine hundred ninety-three".