80778193 has 2 divisors, whose sum is σ = 80778194. Its totient is φ = 80778192.

The previous prime is 80778167. The next prime is 80778197. The reversal of 80778193 is 39187708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74080449 + 6697744 = 8607^2 + 2588^2 .

It is a cyclic number.

It is not a de Polignac number, because 80778193 - 2¹⁷ = 80647121 is a prime.

It is not a weakly prime, because it can be changed into another prime (80778197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40389096 + 40389097.

It is an arithmetic number, because the mean of its divisors is an integer number (40389097).

Almost surely, 2^80778193 is an apocalyptic number.

It is an amenable number.

80778193 is a deficient number, since it is larger than the sum of its proper divisors (1).

80778193 is an equidigital number, since it uses as much as digits as its factorization.

80778193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 80778193 is about 8987.6689413885. The cubic root of 80778193 is about 432.2795704790.

The spelling of 80778193 in words is "eighty million, seven hundred seventy-eight thousand, one hundred ninety-three".