80549993 has 2 divisors, whose sum is σ = 80549994. Its totient is φ = 80549992.

The previous prime is 80549981. The next prime is 80550037. The reversal of 80549993 is 39994508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72726784 + 7823209 = 8528^2 + 2797^2 .

It is a cyclic number.

It is not a de Polignac number, because 80549993 - 2⁴ = 80549977 is a prime.

It is not a weakly prime, because it can be changed into another prime (80549393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40274996 + 40274997.

It is an arithmetic number, because the mean of its divisors is an integer number (40274997).

Almost surely, 2^80549993 is an apocalyptic number.

It is an amenable number.

80549993 is a deficient number, since it is larger than the sum of its proper divisors (1).

80549993 is an equidigital number, since it uses as much as digits as its factorization.

80549993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 80549993 is about 8974.9647910173. The cubic root of 80549993 is about 431.8721204282.

The spelling of 80549993 in words is "eighty million, five hundred forty-nine thousand, nine hundred ninety-three".