77012249 has 2 divisors, whose sum is σ = 77012250. Its totient is φ = 77012248.

The previous prime is 77012239. The next prime is 77012291. The reversal of 77012249 is 94221077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69422224 + 7590025 = 8332^2 + 2755^2 .

It is an emirp because it is prime and its reverse (94221077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77012249 - 2¹² = 77008153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77012239) 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, 38506124 + 38506125.

It is an arithmetic number, because the mean of its divisors is an integer number (38506125).

Almost surely, 2^77012249 is an apocalyptic number.

It is an amenable number.

77012249 is a deficient number, since it is larger than the sum of its proper divisors (1).

77012249 is an equidigital number, since it uses as much as digits as its factorization.

77012249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 77012249 is about 8775.6623111877. The cubic root of 77012249 is about 425.4546442662.

The spelling of 77012249 in words is "seventy-seven million, twelve thousand, two hundred forty-nine".