77266393 has 2 divisors, whose sum is σ = 77266394. Its totient is φ = 77266392.

The previous prime is 77266379. The next prime is 77266429. The reversal of 77266393 is 39366277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38975049 + 38291344 = 6243^2 + 6188^2 .

It is a cyclic number.

It is not a de Polignac number, because 77266393 - 2¹³ = 77258201 is a prime.

It is not a weakly prime, because it can be changed into another prime (77266373) 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, 38633196 + 38633197.

It is an arithmetic number, because the mean of its divisors is an integer number (38633197).

Almost surely, 2^77266393 is an apocalyptic number.

It is an amenable number.

77266393 is a deficient number, since it is larger than the sum of its proper divisors (1).

77266393 is an equidigital number, since it uses as much as digits as its factorization.

77266393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 43.

The square root of 77266393 is about 8790.1304313417. The cubic root of 77266393 is about 425.9221370915.

The spelling of 77266393 in words is "seventy-seven million, two hundred sixty-six thousand, three hundred ninety-three".