77001229 has 2 divisors, whose sum is σ = 77001230. Its totient is φ = 77001228.

The previous prime is 77001149. The next prime is 77001257. The reversal of 77001229 is 92210077.

It is a happy number.

It is an a-pointer prime, because the next prime (77001257) can be obtained adding 77001229 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68724100 + 8277129 = 8290^2 + 2877^2 .

It is an emirp because it is prime and its reverse (92210077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77001229 - 2⁷ = 77001101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77001197 and 77001206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77001269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38500614 + 38500615.

It is an arithmetic number, because the mean of its divisors is an integer number (38500615).

Almost surely, 2^77001229 is an apocalyptic number.

It is an amenable number.

77001229 is a deficient number, since it is larger than the sum of its proper divisors (1).

77001229 is an equidigital number, since it uses as much as digits as its factorization.

77001229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 77001229 is about 8775.0344158869. The cubic root of 77001229 is about 425.4343499455.

The spelling of 77001229 in words is "seventy-seven million, one thousand, two hundred twenty-nine".