78075773 has 2 divisors, whose sum is σ = 78075774. Its totient is φ = 78075772.

The previous prime is 78075761. The next prime is 78075827. The reversal of 78075773 is 37757087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51222649 + 26853124 = 7157^2 + 5182^2 .

It is a cyclic number.

It is not a de Polignac number, because 78075773 - 2¹⁰ = 78074749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78065773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39037886 + 39037887.

It is an arithmetic number, because the mean of its divisors is an integer number (39037887).

Almost surely, 2^78075773 is an apocalyptic number.

It is an amenable number.

78075773 is a deficient number, since it is larger than the sum of its proper divisors (1).

78075773 is an equidigital number, since it uses as much as digits as its factorization.

78075773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288120, while the sum is 44.

The square root of 78075773 is about 8836.0496263885. The cubic root of 78075773 is about 427.4041790188.

The spelling of 78075773 in words is "seventy-eight million, seventy-five thousand, seven hundred seventy-three".