77070073 has 2 divisors, whose sum is σ = 77070074. Its totient is φ = 77070072.

The previous prime is 77070031. The next prime is 77070157. The reversal of 77070073 is 37007077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39087504 + 37982569 = 6252^2 + 6163^2 .

It is an emirp because it is prime and its reverse (37007077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77070073 - 2⁹ = 77069561 is a prime.

It is equal to p_4508392 and since 77070073 and 4508392 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (77070013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38535036 + 38535037.

It is an arithmetic number, because the mean of its divisors is an integer number (38535037).

Almost surely, 2^77070073 is an apocalyptic number.

It is an amenable number.

77070073 is a deficient number, since it is larger than the sum of its proper divisors (1).

77070073 is an equidigital number, since it uses as much as digits as its factorization.

77070073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7203, while the sum is 31.

The square root of 77070073 is about 8778.9562591461. The cubic root of 77070073 is about 425.5611006415.

The spelling of 77070073 in words is "seventy-seven million, seventy thousand, seventy-three".