77726273 has 2 divisors, whose sum is σ = 77726274. Its totient is φ = 77726272.

The previous prime is 77726221. The next prime is 77726279. The reversal of 77726273 is 37262777.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74511424 + 3214849 = 8632^2 + 1793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77726273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77726273.

It is not a weakly prime, because it can be changed into another prime (77726279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38863136 + 38863137.

It is an arithmetic number, because the mean of its divisors is an integer number (38863137).

Almost surely, 2^77726273 is an apocalyptic number.

It is an amenable number.

77726273 is a deficient number, since it is larger than the sum of its proper divisors (1).

77726273 is an equidigital number, since it uses as much as digits as its factorization.

77726273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172872, while the sum is 41.

The square root of 77726273 is about 8816.2505068765. The cubic root of 77726273 is about 426.7654780776.

The spelling of 77726273 in words is "seventy-seven million, seven hundred twenty-six thousand, two hundred seventy-three".